Rubber

The operational success of road transport in the European market depends on the structural integrity and thermal insulation of its fleets. In commercial vehicle design, EPDM gaskets play a crucial role by forming the main defense barrier at the metal-rubber interfaces of rear doors and side tailgates. A millimetric failure in the airtightness of these systems translates into water infiltration losses, dust contamination, and critical thermal bridges in refrigerated transport. For this reason, bodywork engineering demands the use of an EPDM profile with rigorous manufacturing tolerances, capable of withstanding severe mechanical dynamics over thousands of opening cycles. Geometry and Hardness Dynamics Under Vibrations, Water, and Dust in Truck Bodies The geometric design of rubber components does not respond solely to gap-filling criteria, but to the active management of pressure vectors and elastic deformations. To simultaneously neutralize structural vibrations of the truck on the road, high-speed rain hydrostatic pressure, and the entry of fine particles, the extrusion of EPDM gaskets must combine dual-durometer or co-extrusion configurations. The anchoring zones of the gasket require a high-hardness compact rubber (between 70 and 80 Shore A) to fix firmly to the aluminum or steel profiles of the frames without undergoing displacement due to shearing. On the contrary, the active sealing section (the bulb or lip) is designed in low-density cellular or sponge rubber, with a hardness between 30 and 40 Shore A, allowing controlled deformation with minimal closing forces. This geometric combination in EPDM profiles ensures that, under the harmonic vibrations of the vehicle chassis, the alveolar section maintains a continuous and resilient contact against the metal counterplate. This dissipates mechanical energy and prevents premature wear due to friction of the metal on the polymer. The Principle of the Continuous Labyrinth Seal in Perimetric Frames Mere frontal compression of a flat gasket is insufficient for international road freight transport standards. The most advanced truck bodies employ overlapping flange architectures or Z-shaped stepped profiles that configure a continuous labyrinth closure system. By integrating multi-chamber EPDM gaskets within this geometric path, pressurized air and water are forced to make multiple abrupt changes in direction, losing their kinetic energy before reaching the interior of the cargo compartment. This labyrinth design drastically reduces the risk of capillary penetration of water and fine dust. To guarantee that this perimetric barrier suffers no discontinuities, European manufacturers turn to continuous vulcanization systems and corner joints using injection molds of the same polymer, eliminating the typical weak points of manually glued miter cuts. Optimal Compression Calculations and Metal-Rubber Interfaces A common error in the assembly phase is the over-compression of the rubber under the false premise that greater pressure equals greater tightness. Gasket engineering stipulates that the nominal gap of the gasket must be designed to compress the cellular profile between 20% and 30% of its initial un-deformed volume. Exceeding this critical range causes a phenomenon known as compression set, where the elastomer permanently loses its elastic memory and recovery capacity, destroying the seal in the medium term. On the other hand, compression of less than 20% exposes the tailgate to filtration under dynamic wind loads. The physical interface where the extruded aluminum of the door and the rubber interact must be free of sharp edges and feature a surface treatment that minimizes the friction coefficient, preventing tears during the micro-oscillations of the truck en route. Integration of Thermal Bridge Breaks and Combined Profiles in Refrigerated Vans In the specific segment of refrigerated and isothermal transport, strictly regulated in Europe by the ATP agreement, gasket design acquires a thermodynamic dimension. Gaskets must completely avoid direct mechanical contact between the outer metal sheet of the truck and the inner lining of the loading area to suppress thermal bridges. This is achieved through structural separation using high-density rigid PVC profiles or aerospace composites, combined with EPDM gaskets featuring multiple intermediate insulating air chambers. The use of co-extrusion profiles composed of a rigid quick-engagement base (clip-in) and sponge rubber sealing bulbs optimizes not only thermal efficiency by retaining the cold indoor air, but also assembly times on the bodybuilder’s production line. The evolution of these technologies oriented towards sustainability and carbon footprint reduction in heavy transport aligns with the guidelines of the European Automobile Manufacturers’ Association (ACEA), which drives global energy efficiency in latest-generation industrial vehicles. Supply Chain Optimization with Custom Profiles from ISOGOM The production and supply of sealing solutions for the international transport sector demand an industrial partner with advanced engineering capabilities and absolute matrix customization. ISOGOM, with more than two decades of experience and quality certification under the international management systems standard, provides an integral service in the design, development, and manufacture of custom matrices for the extrusion of complex plastic and rubber profiles. If your next commercial vehicle or transport fleet project requires maximizing airtightness, reducing assembly costs, and ensuring compliance with the most demanding insulation standards in the market, trust the technological capacity of ISOGOM. Get in touch with our team of specialist engineers through our technical services and support section of ISOGOM to request a personalized feasibility study, quotes for custom profiles, or assistance in the specification of high-performance industrial polymers.

In sectors such as automotive, logistics, the food industry or advanced industrial manufacturing, protection systems manufactured through technical extrusion make it possible to adapt each component to the real needs of the installation. In this context, specialized companies such as ISOGOM develop custom seals and profiles capable of being integrated into multiple industrial applications with demanding technical requirements. The Importance of Seals and Profiles in Industrial Workbenches Industrial workbenches are subjected to constant impacts, vibrations, humidity, chemical products and repetitive movements that ultimately affect both the structure and operator safety. The incorporation of technical extrusion profiles helps protect edges, absorb impacts and improve sealing in sensitive areas. In modern industrial applications, seals and profiles are integrated directly onto structures manufactured with industrial steel, aluminium or composite material profiles. This combination makes it possible to create stronger, safer and more durable work surfaces, especially in automated production lines or assembly stations. Seal manufacturers specialized in technical extrusion currently work with materials such as EPDM, silicone, flexible PVC and engineering thermoplastics capable of withstanding extreme temperatures, UV exposure and continuous chemical contact. As a result, current solutions provide much more stable performance than conventional protection systems. In applications where there are risks of impacts or vibrations, protective profiles also help reduce structural deterioration and minimize preventive maintenance costs. According to the Spanish Association for Standardization, the protection of industrial elements through elastomeric components is essential for extending the service life of installations subjected to intensive use. How to Integrate “U” Profiles, Edge Protectors and Stops into Industrial Structures The correct integration of technical profiles requires understanding both the geometry of the structure and the real operating conditions of each installation. In this regard, “U” profiles, edge protectors and elastomeric stops represent some of the most widely used solutions within the seals and profiles industry for industrial applications. Integration of “U” Profiles “U” profiles are mainly used to protect metal edges, cover sharp surfaces and improve safety in areas of frequent contact. Their installation is particularly common in workbenches manufactured with industrial steel profiles, where they help reduce accident risks and surface wear. Thanks to custom profile extrusion, these profiles can be adapted to different sheet thicknesses and complex geometries. In addition, materials such as EPDM provide excellent resistance to oils, moisture and atmospheric agents, allowing their use in both indoor and outdoor applications. Edge Protectors for Protection and Durability Edge protectors perform an essential function in production lines where there is continuous movement of parts, tools or metal components. In addition to protecting structural surfaces, they help reduce vibrations and prevent premature damage in high-friction areas. In sectors such as the food or pharmaceutical industries, edge protectors also contribute to improving cleanliness and hygienic safety within installations, especially when manufactured from certified technical materials. The possibility of manufacturing co-extruded profiles allows each solution to be adapted to its specific operating environment. This customization capability is precisely one of the main competitive advantages of specialized manufacturers such as ISOGOM. Elastomeric Stops for Impact Absorption Industrial stops manufactured using technical rubber compounds or EPDM extrusion make it possible to absorb mechanical energy and protect both structures and machinery from repetitive impacts. These solutions are especially common in: • industrial workbenches• automated lines• logistics docks• mobile machinery• robotic stations Stops can be manufactured in multiple geometries, including solid profiles, hollow profiles or multilayer combinations designed to improve compression capacity and elastic recovery. Custom Manufacturing and Technical Extrusion in Industrial Applications Today, industry demands increasingly specific solutions adapted to complex production processes. For this reason, the development of customized seals and profiles has evolved toward advanced manufacturing systems capable of meeting highly specific design and integration requirements. Technical extrusion allows the manufacture of profiles with: • complex geometries• different hardness levels• solid and cellular sections• metal inserts• specific finishes• enhanced chemical or thermal resistance In European industrial applications, this customization capability is particularly important for OEM manufacturers, engineering firms and industrial automation companies. In the case of ISOGOM, experience in technical profile extrusion enables the development of solutions adapted to both standard applications and customized industrial projects. This includes edge protection profiles, sealing systems, industrial stops and technical solutions manufactured according to specific customer requirements. EPDM and Thermoplastics: Key Materials for Industrial Seals and Profiles EPDM remains one of the most widely used materials in the industrial sector due to its excellent resistance to ageing, ozone and aggressive environmental conditions. These properties make this elastomer a particularly effective solution for workbenches, stops and protective elements exposed to humidity or UV radiation. In addition to EPDM, seal manufacturers currently work with engineering thermoplastics capable of providing: • high flexibility• chemical resistance• excellent elastic recovery• ease of installation• lower structural weight The choice between EPDM, silicone or TPE depends on factors such as: • operating temperature• chemical exposure• mechanical requirements• industry regulations• cleaning and hygiene needs The Evolution of the Seals and Profiles Market in European Industry The seals and profiles market has evolved significantly in recent years due to the growth of industrial automation and the need for more specialized solutions. Today, industrial companies are not only looking for standard components but also technical partners capable of developing customized industrial rubber seals and profiles adapted to their production processes. This trend has increased demand for manufacturers with expertise in: • technical extrusion• materials engineering• industrial design• custom manufacturing• integration into machinery and complex structures In this environment, collaboration between seal manufacturers and industrial sectors is key to developing more efficient, safer and more sustainable solutions. ISOGOM: Technical Seals and Profiles Solutions for Industrial Applications The integration of seals and profiles into workbenches, stops and industrial structures requires technical expertise, material knowledge and custom manufacturing capabilities. In applications where protection, sealing and mechanical resistance are essential, working with a specialized manufacturer makes a significant difference in terms of durability and operational performance. ISOGOM develops technical extrusion solutions adapted to the real needs of European industry, manufacturing custom profiles and seals for multiple industrial sectors. Thanks to its

In demanding industrial environments, the cost of a seal is not measured by its unit price, but by its impact on the complete system. The concept of TCO (Total Cost of Ownership) has ceased to be an abstract financial metric and has become a critical design criterion in product engineering. In this context, seal extrusion solutions take on a strategic role: they not only guarantee sealing, but also determine assembly times, line stability and the frequency of issues. In sectors where every second of assembly and every field failure have a direct impact on profitability, correctly designing an extruded profile is not an isolated technical decision, but an investment in operational efficiency. TCO-oriented seal design: beyond the material The most common mistake in the selection of industrial seals is still to evaluate only the material or the initial cost. However, the most advanced manufacturers already work under a different logic: designing geometry, mechanical behaviour and assembly integration from a full life cycle perspective. Seal extrusion solutions make exactly this possible. Through processes such as coextrusion or continuous vulcanisation, it is possible to develop profiles with differentiated areas of rigidity, compression and elastic recovery, adapted to the exact assembly point. This reduces the need for line adjustments, avoids deformations during installation and guarantees stable behaviour in real conditions. In this sense, the role of seal manufacturers has evolved: they no longer limit themselves to production, but collaborate in the functional design of the component within the system. Reduction of line times: design that simplifies assembly One of the most direct impacts of seal design can be seen on the assembly line. In industrial applications, small variations in geometry or material hardness can generate resistance during insertion, the need for additional tools or even positioning errors. Extrusion profiles designed with assembly criteria make it possible to significantly reduce these problems. Geometries optimised for fitting, controlled tolerances and materials with suitable elastic memory facilitate fast, repeatable installation without corrective intervention. In a European transport sector plant, a seal redesign based on technical profile extrusion made it possible to reduce assembly time per unit by more than 18%. The line, the operator and the process were not modified: only the seal. This type of optimisation, apparently minor, has an enormous cumulative impact on annual production. Less waste and fewer issues: the impact on quality Another of the key TCO factors is the reduction of waste and defects. Poorly designed or poorly selected seals are usually one of the main causes of rejection in quality control, especially in systems where sealing is critical. Seal extrusion solutions developed with precise control of tolerances and mechanical properties make it possible to minimise variations between batches and ensure consistent behaviour. This reduces production deviations and avoids reprocessing. In addition, the integration of functions into a single profile, made possible thanks to techniques such as coextrusion, eliminates additional components, reducing potential failure points. Fewer parts mean lower probability of error and greater system robustness. At this point, plastic extrusion profiles and technical rubber extrusion offer a clear advantage over assembled solutions made up of multiple elements. Sealing and claims: the hidden cost that really matters Claims due to sealing failures represent one of the most critical and least visible costs in TCO. They not only involve replacements or repairs, but also reputational impact, contractual penalties and loss of customer confidence. A seal that fails in the field rarely does so for a single reason. It is usually the result of a combination of factors: inadequate design, incorrect material, poorly defined tolerances or unconsidered real conditions. This is where the engineering approach of companies such as ISOGOM makes the difference. Application analysis, selection of the appropriate material (EPDM, TPE, TPV) and profile design according to the operating environment make it possible to anticipate these failures before they occur. Functional integration: fewer parts, more efficiency One of the key principles in modern industrial design is reducing the number of components. Every additional part implies cost, complexity and risk. Seal extrusion solutions make it possible to integrate multiple functions into a single profile: sealing, vibration absorption, fixing or insulation. This simplifies the design of the assembly and reduces assembly operations. From supplier to technical partner: the real value of the manufacturer In this new scenario, choosing between different seal manufacturers should not be based only on production capacity or price. The true value lies in the ability to support the customer from the design phase to validation in real application. ISOGOM works under this approach, developing tailor-made profiles through plastic extrusion profiles and technical rubber compounds, with controlled processes that guarantee dimensional stability and repeatability. This allows its customers not only to improve the performance of their products, but also to optimise their long-term operating costs. Designing seals thinking about the complete system TCO is not optimised in the purchasing department, but in the design phase. Every decision regarding a seal, material, geometry or manufacturing process has a direct impact on assembly, quality and product service life. Seal extrusion solutions represent one of the most effective tools to reduce costs without compromising performance. When correctly designed, they allow faster assemblies, fewer issues and greater field reliability. If you are looking to reduce assembly times, minimise sealing claims and optimise the overall performance of your systems, at ISOGOM you will find a technical partner capable of designing the right solution for your application.

The comparison between EPDM gaskets and solutions based on thermoplastic elastomers such as TPE or TPV has become a common technical debate in architecture and engineering projects. Both materials offer specific advantages, but their long-term performance outdoors can vary significantly depending on climate, UV radiation, and aging conditions. In this context, material selection should not be approached as a generic decision, but as a technical process based on the specific analysis of each application. At ISOGOM, we carry out a detailed study of service conditions, profile geometry, and mechanical requirements to determine which material—whether EPDM gaskets or thermoplastic solutions—is most suitable in each case. The critical role of gaskets in facade systems Modern facades are designed as complex systems in which each component fulfills a precise function. Within this system, elastomeric gaskets act as dynamic elements capable of absorbing structural movements, compensating for thermal expansion, and ensuring watertightness against air and water. When properly designed, EPDM gaskets or thermoplastic systems can maintain their functionality for decades. However, material degradation can lead to progressive phenomena that directly affect building performance: loss of elasticity, surface cracking, permanent deformation, or reduced sealing capacity. These issues are intensified in climates with high solar radiation or significant thermal variations, where the material must withstand continuous processes of expansion, contraction, and photochemical aging. For this reason, selecting the material for a window seal or facade sealing profiles should not be based solely on initial cost, but on its actual behavior against environmental factors over time. EPDM: technical benchmark in exterior sealing EPDM (Ethylene Propylene Diene Monomer) is one of the most widely used synthetic elastomers in outdoor applications due to its exceptional resistance to environmental aging. Its saturated chemical structure allows it to withstand ultraviolet radiation, ozone, and atmospheric agents with a stability that few elastomeric materials can match. EPDM gaskets stand out for maintaining their elasticity even after years of exposure to sunlight and repeated thermal cycles. This property is essential in facade systems, where structural movements and expansion may require continuous deformation of the material. Another key advantage is its excellent elastic recovery. A compressed EPDM profile in an extruded rubber seal tends to return to its original shape once the load is removed, ensuring constant pressure against contact surfaces and preventing leaks. In applications such as window seal systems or EPDM profiles for joinery, this recovery capability translates into stable sealing even after thousands of opening and closing cycles. Additionally, EPDM offers high resistance to extreme temperatures, maintaining flexibility in both cold climates and environments with intense solar radiation. This makes it particularly suitable for architectural projects exposed to outdoor conditions over long periods. TPE and TPV: flexibility in processing and design Thermoplastic elastomers such as TPE and TPV have gained popularity in recent years due to their ease of processing and compatibility with industrial processes such as co-extrusion. Unlike EPDM, these materials combine characteristics of plastics and rubber. They can be processed using techniques similar to thermoplastic injection or extrusion, enabling the production of complex geometries and reducing manufacturing times. In technical profiles for enclosures or joinery, TPE and TPV offer interesting advantages, especially when integrated into multilayer systems or hybrid profiles combining rigid and flexible zones. These are often used within advanced extrusion profiles solutions. However, when analyzing long-term outdoor applications, resistance to environmental aging becomes a decisive factor. Although modern TPEs have significantly improved their UV resistance, their stability under intense solar radiation and ozone exposure is generally lower than that of EPDM gaskets, particularly in permanently exposed applications. Aging and UV resistance in facade applications Ultraviolet radiation is one of the main degradation factors in polymers used outdoors. Over time, high-energy photons can break molecular bonds at the material surface, causing hardening, loss of elasticity, and the appearance of microcracks. In this context, EPDM has historically demonstrated superior resistance to photochemical aging. Its molecular composition allows it to withstand long periods of solar exposure with minimal deterioration, which explains its widespread use in roofing, waterproofing membranes, and facade EPDM profiles. TPE and TPV, on the other hand, may require additional UV stabilizers to improve outdoor durability. Even with these additives, under conditions of intense radiation or very warm climates, their long-term performance may be less stable than that of an EPDM profile specifically designed for architectural applications. Elastic recovery and mechanical behavior In addition to environmental resistance, the performance of a facade gasket largely depends on its mechanical behavior under compression. EPDM gaskets offer excellent elastic recovery even after long periods of compression. This property allows the material to maintain constant pressure on sealing surfaces, preventing air or water leaks and ensuring reliable performance in industrial rubber seals applications. Thermoplastic elastomers, while offering good initial properties, may experience permanent deformation more quickly under certain continuous load conditions. In applications such as window seal systems, where the material remains compressed for years within joinery systems, this difference in recovery can have a direct impact on sealing durability. For this reason, many high-performance facade systems continue to use EPDM profiles as the preferred solution to ensure long-term reliability. Material selection based on climate and exposure The choice between EPDM and thermoplastic elastomers must always consider actual service conditions. In projects located in regions with high solar radiation, strong thermal variations, or constant outdoor exposure, EPDM generally offers greater long-term stability. Conversely, in applications where the component is protected from the exterior or where integration with complex plastic profiles is a priority, TPE or TPV may represent a viable alternative. For this reason, in demanding industrial and architectural environments, it is essential to rely on prior analysis that considers all these factors. At ISOGOM, we approach each project through a customized technical study that allows us to define whether the optimal solution involves EPDM gaskets or thermoplastic materials, depending on real usage conditions. Engineering EPDM profiles for durable facades In demanding architectural applications, gasket performance depends not only on the polymer used but also on the technical design of the profile

Silicone is one of the most valued materials in industrial gasket and seal engineering due to its exceptional balance of flexibility, thermal stability, and chemical resistance. When a company evaluates sealing options for demanding applications, understanding when silicone provides clear advantages over traditional elastomers or rigid plastic materials is crucial. In this context, silicone extrusion profiles offer a technical solution that meets sophisticated performance, durability, and extreme environment compatibility requirements. Unlike other rubber formulations or thermoplastics that may lose properties under temperature or chemical stress, silicone gaskets maintain structural and functional integrity. Therefore, choosing the right material should not be based solely on cost but on understanding operational demands and the application environment. ISOGOM, with decades of experience in silicone gasket extrusion, advises industries ranging from energy to automotive on when this material adds real value. How Thermal Range Influences Silicone Gasket Selection Operating temperature range is a decisive factor for selecting a technical sealing material. Silicone gaskets excel where service temperatures far exceed what neoprene or EPDM can withstand. In severe industrial applications, silicone maintains mechanical properties from cryogenic conditions to sustained heat environments without degradation. This thermal range offers direct advantages in applications where dimensional stability is critical, such as electrical equipment exposed to heating and cooling cycles, or chemical process equipment operating at high temperatures continuously. Thanks to this property, ISOGOM has positioned itself as a silicone gasket extrusion company capable of developing profiles that meet strict temperature specifications without compromising long-term sealing. Additionally, silicone exhibits a low thermal hardening rate compared to conventional elastomers. This means that even after repeated exposure to extreme temperatures, gaskets continue functioning without cracking or losing elasticity, resulting in lower maintenance needs and prolonged service life. Aging and Durability: Advantages Over Other Materials Silicone also demonstrates superiority in aging under aggressive environmental conditions. It has excellent resistance to ozone, UV radiation, and oxidation—factors that accelerate degradation in natural or synthetic rubber. For applications exposed to outdoor conditions or continuous wear, silicone gaskets provide superior durability, directly reducing operational costs over the system’s life cycle. Its resistance to chemical aging is notable as well. In environments with oxidizing agents or high humidity, other materials may crack or lose elasticity over time. Silicone’s inherent properties maintain mechanical performance without swelling or significant degradation, keeping seals compliant with their specifications even after years of continuous service. This is why clients in food, pharmaceutical, or medical device sectors, which demand high hygiene and durability, choose ISOGOM as a manufacturer of specialized silicone gaskets. Maintaining functional characteristics over time ensures operational reliability, minimizing downtime and unplanned maintenance. Chemical Behavior: Resistance Where Others Fail The interaction between sealing material and chemical agents in the working environment is another critical selection parameter. Silicone shows especially favorable performance against corrosive or aggressive agents, resisting weak acids, bases, organic compounds, and industrial vapors. This chemical resilience results in lower substance absorption, preserving the seal’s mechanical properties and preventing deformation or premature failure. In applications involving contact with fuels, lubricants, or specific industrial fluids, extruded silicone profiles ensure uniform performance without losing integrity. For example, in transportation or heavy machinery industries, silicone gaskets maintain sealing even under prolonged exposure to hydrocarbons or aggressive chemical solutions. This feature is particularly valuable when reliability and operational safety are non-negotiable. ISOGOM has technical capabilities to formulate silicone compounds resistant to adverse chemical conditions, allowing the design of customized solutions that guarantee optimal sealing without compromising the integral system’s functionality. Typical Applications Where Silicone Offers Technical Advantage The unique thermal, aging, and chemical resistance properties of silicone make it ideal for a wide range of industrial applications. In HVAC and refrigeration systems, silicone gaskets ensure sealing across broad temperature ranges, enduring cold and heat cycles without deterioration. In electronics, silicone’s dielectric properties make it indispensable for gaskets requiring both insulation and sealing. In medical and precision devices, where biocompatibility and long-term stability are essential, silicone gaskets meet regulatory specifications without compromising function or safety. Similarly, in chemical processing equipment, silicone’s chemical robustness reduces the need for frequent replacements, extending component life and reducing unplanned downtime. For all these reasons, when design requirements demand high-performance technical sealing, silicone outperforms other elastomers or conventional polymers. Why Choose Silicone Gasket Extrusion Solutions with ISOGOM As an established supplier, ISOGOM is a benchmark in silicone gasket extrusion, combining technical precision, industrial quality, and adaptability to each client’s needs. Its approach goes beyond standard profile production, encompassing engineering of sealing solutions that meet thermal, chemical, and durability specifications specific to each application. Working with a silicone gasket extrusion company like ISOGOM means receiving guidance from design, compound selection, and material formulation through to the production of profiles meeting tight tolerances and strict industrial standards. This technical approach, supported by quality certifications and continuous control processes, ensures gaskets not only meet performance requirements but provide long-term operational reliability. ISOGOM combines extrusion expertise with deep understanding of industries such as automotive, urban equipment, industrial machinery, and food processing. Its gasket extrusion solutions result from decades of applied innovation and response to real engineering challenges. When Silicone Makes the Difference Choosing silicone as a technical sealing material ceases to be a preference and becomes a strategic decision when temperature, aging, chemical resistance, and dimensional stability requirements exceed other materials’ capabilities. Its extended thermal range, behavior against aggressive agents, and longevity in continuous service make it ideal for demanding industrial applications. If your project requires gaskets meeting these criteria and more, selecting a provider experienced in silicone gasket extrusion will make a tangible difference. At ISOGOM, you will find a technical partner capable of advising, proposing customized solutions, and supplying profiles that enhance system reliability and lifespan. Contact ISOGOM and discover how our advanced silicone gasket extrusion solutions can optimize your equipment performance. We are ready to support you from concept to delivery of sealed profiles meeting the most stringent standards.

In bi/tri-extrusion, everything works fine… until a bonding line appears that moves, opens, or becomes visible on the surface. This “seam” between layers is the critical interface: if it is not properly controlled, it results in rejected meters, complaints, and significant loss of time. In this article, we look at how polymer processing affects these interfaces, which variables need to be monitored, and what an experienced gasket extrusion company like ISOGOM can contribute. What exactly is a critical interface in bi/tri-extrusion? When we co-extrude two or three materials, their flows meet inside the die and generate an internal bonding line. This interface will be: • Invisible and stable, if compatibility and process conditions are correct.• Visible or unstable, if there are viscosity differences, internal stresses, or poor channel geometry. Typical problems when the interface gets out of control include: • Visible marks or “shadows” on the visible surface.• Micro-cracks or delamination between layers.• Loss of sealing performance in gasket extrusion solutions where the sealing layer does not work as intended. In technical profiles (closures, automotive, transport…), these small defects translate into noise, leaks, or premature aging. Material compatibility: the first filter Before talking about temperatures and speeds, we need to talk about pairing: which polymers are going to “touch” each other? In bi/tri-extrusion of rigid profiles and flexible gaskets, it is advisable to review: In other words, if polymer processing is not approached from the material–process pairing, the interface will be a source of problems from the very first meter. For more information on extruded rubber and industrial rubber seals. Die design and process parameters Once materials are selected, the next level of control lies in tooling design and the process recipe: • Channel geometry: avoid abrupt section changes that create dead zones, recirculation, or excessive shear at the bonding line.• Flow balancing: small flow rate differences between extruders can shift the interface and make it “serpentine”.• Temperature profile: a material that is too cold or too hot at the meeting point will create stresses and potential micro-cracks.• Line speed and calibration: if haul-off is not properly synchronized, the interface may stretch or thin out, losing continuity. At ISOGOM, these adjustments are part of the daily work in our continuous polymer processing operations, especially when dealing with profiles combining multiple hardness levels or rubber/thermoplastic combinations for closures and industrial applications. This applies both to complex extrusion profiles and to high-performance extruded rubber seal designs. Why rely on a specialized gasket extrusion company? Not all lines and not all equipment are prepared to handle complex bi/tri-extrusion. Working with a specialized gasket extrusion company provides: • Product and process engineering support from geometry design through industrialization.• Fine-tuning of materials to achieve clean bonding without compromising functionality (sealing, tolerance absorption, aging resistance…).• The ability to test polymer variants, hardness levels, and layer configurations until a robust process window is achieved. At ISOGOM, we combine this experience across multiple sectors (construction, industry, transport…) with custom tooling and in-line dimensional control to ensure stable bonding, even in long and demanding production runs of industrial rubber seals and silicone extrusion profiles. Next step: taking your design to continuous production If you are in the design phase of a bi/tri-extruded profile and are concerned about bonding line stability, now is the ideal time to talk: The earlier the interface is considered, the fewer surprises there will be on the shop floor. Would you like to discuss your project with the ISOGOM technical team? You can get in touch with us.

When we talk about gaskets for industrial ovens, the key question is not only “can it withstand the temperature?”, but “how long will it last without downtime or leaks?”. Choosing between silicone and EPDM directly impacts service life, maintenance costs, and production line continuity. Let’s look, in practical terms, at when each material is the right choice and how we work with them at ISOGOM within our industrial rubber seals design process. What do we require from a gasket in an industrial oven? In a process oven (food, coating, curing, etc.), the gasket usually operates under: • High temperatures and continuous thermal cycles.• Water vapor, CIP cleaning, or frequent washdowns.• Constant compression in doors, covers, or conveyor pass-throughs. That’s why from good industrial rubber seals we require: • Dimensional stability (so it does not “flatten” after a few months).• Resistance to heat and, where applicable, to steam and detergents.• Easy replacement and good adjustment repeatability. This is where the real differences between silicone and EPDM come into play. Silicone: the solution for extreme heat and sanitary visibility Silicone is the go-to material when the oven operates in the 200–250 °C range or even higher, and when strict hygienic requirements apply. Many high-temperature silicone sealing compounds can withstand peaks of up to 300 °C depending on formulation and thickness. Typical advantages for gaskets for industrial ovens include: • Wide thermal range, with good performance even at low temperatures.• Excellent flexibility and elastic recovery, ideal for doors that open and close frequently.• Availability of food-grade and detectable qualities for process industries. The use of silicone extrusion profiles makes it possible to manufacture custom profiles for chambers, tunnel ovens, or special doors. The less favorable point? Raw material cost is higher than standard EPDM, and in very aggressive steam environments, careful dimensioning may be required. EPDM: specialist in hot water and steam EPDM is a synthetic rubber widely used in seals for installations with hot water and steam, thanks to its good resistance to these media and to weathering. In ovens where: • Operating temperature is closer to 120–150 °C,• There is significant steam exposure and frequent wash cycles,• And cost per meter is a sensitive factor, EPDM can be a very balanced alternative to silicone, often offering a better cost-to-performance ratio in many technical applications. However, attention must be paid to: For more details on performance differences, this comparative guide EPDM vs silicone clearly outlines the pros, cons, and operating ranges of each material. Quick comparison: which one extends service life the most? Summarized from a service continuity perspective for gaskets for industrial ovens: • Extreme temperature and dry environment: silicone usually wins, especially above 200 °C.• Moderate temperature + steam / hot water: EPDM offers excellent steam and aging resistance at a lower cost.• Food or sanitary environments: silicone, particularly in specific food-contact grades.• Maintenance shutdowns: a properly dimensioned extruded rubber seal in the right material reduces changes due to fatigue, cracking, or premature hardening. In oven and heating applications, it is also useful to see how certain high-temperature silicone sealants are specifically used for oven doors and heating systems. Where does ISOGOM fit into this decision? Theory helps, but every oven is different. As plastic extrusion companies and gasket manufacturers, at ISOGOM we don’t just talk about materials: we analyze temperature curves, opening cycles, presence of steam or chemicals, and the type of metal support. With this information: The goal is simple: to ensure your gaskets for industrial ovens operate for as long as possible without failure, with predictable maintenance planning and no surprises. If you are considering redesigning your seals or changing material, the ideal time to review the silicone vs EPDM decision is before the next line shutdown. At ISOGOM, we can help you do it using real process data and a tailored solution.

In the food, beverage, pharmaceutical, and biotechnology industries, maintaining strict hygiene is non-negotiable. Equipment must be routinely sanitized using CIP (Cleaning-In-Place) or SIP (Sterilization-In-Place) protocols. These processes involve circulating aggressive chemicals (strong acids, alkalis, peroxides) and/or high-temperature steam. For any piece of processing equipment (tanks, pipes, valves, pumps) the seals are the weak point. A failure in the rubber extrusion seal due to chemical attack or heat degradation can lead to contamination, process downtime, and costly compliance issues. Choosing the right elastomer for these demanding environments is a technical challenge where material expertise is critical. The Challenges of CIP/SIP on Extrusion Seals CIP/SIP cleaning subjects the extrusion seal to extreme conditions: A standard industrial rubber seal will quickly fail under these conditions. Material Selection for Hygienic Rubber Seal Extrusion Profiles The ideal material for rubber seal extrusion profiles in hygienic applications must offer both excellent chemical and thermal resistance. The three primary materials used are EPDM, FKM, and Silicone: Material Key Strengths Limitations in CIP/SIP Best Application EPDM (Peroxide-Cured) Excellent hot water and steam resistance. Good chemical resistance to polar solvents and acids. Poor resistance to oils, greases, and non-polar solvents. Food/beverage lines, steam sterilization. FKM (Fluoroelastomer) Superior chemical resistance (acids, bases, oils, solvents). High-temperature performance. Poor resistance to hot water/steam over long periods; high cost. Chemical processing, high-fat food products. Silicone (VMQ) Excellent high/low-temperature stability. Very low compression set. Poor resistance to concentrated steam and strong acids/bases; low mechanical strength. Low-pressure applications, general sealing where high temperature is key. For most high-pressure, steam-based CIP/SIP systems, peroxide-cured EPDM is often the first choice due to its excellent resistance to steam and common cleaning agents, provided the process does not involve high levels of animal fats or oils. Hygienic Design and Compliance Beyond the material, the design of the extruded rubber seal must facilitate cleaning: ISOGOM: Your Partner in Hygienic Sealing As experts in rubber extrusion seal manufacturing, ISOGOM understands the critical nature of CIP/SIP compliance. We specialize in providing rubber seal extrusion profiles that meet the stringent requirements of hygienic systems: Do you need a reliable, compliant rubber extrusion seal for your hygienic equipment?Contact ISOGOM today for a quote and consultation on finding the ideal extrusion seal material and profile for your demanding CIP/SIP application.

In modern construction, energy efficiency is paramount. For aluminium window, door, and facade systems, this translates directly to the effectiveness of the thermal break. An aluminium profile, while structurally robust, is highly conductive, creating a “thermal bridge” that allows heat to escape in winter and enter in summer, leading to significant energy loss and internal condensation. A high-performance system must incorporate a thermal break (a non-metallic barrier inserted between the inner and outer parts of the aluminium profile) to disrupt this path of heat flow. Here is a look at the essential components and seals an expert aluminium extrusion profile supplier provides to ensure maximum thermal performance. More info here about aluminium windows. The Core Component: Polyamide Profiles The most common material for the thermal break component itself is Polyamide (PA) reinforced with glass fibers. Polyamide offers a low thermal conductivity, effectively isolating the interior and exterior profile shells. The Role of Seals and Gaskets in Thermal Performance While the polyamide profile stops conduction, the seals stop convection and air leakage. Without proper sealing, air can circulate through the chambers of the extrusion profiles, nullifying the thermal break’s effect. The Impact of Profile Connector Design In complex assemblies, such as corners or mullion/transom junctions, the thermal continuity must be maintained. This is where the design of the profile connector and ancillary seals becomes crucial. Why Choose ISOGOM for Thermal Break Components and Seals? As a specialized aluminium extrusion profile supplier (focusing on the sealing components), ISOGOM ensures that your thermal breaking system achieves its full potential. We provide high-quality sealing solutions that complement the Polyamide strips: Contact us to discuss your thermal break project. We will supply the sealing components and expertise needed to achieve superior energy ratings and condensation control in your aluminium systems.