In the high-stakes world of industrial and safety-critical applications, the fire resistance of rubber materials isn't just a technical specification – it's essential for long-term success.
Selecting the right rubber material can mean the difference between containment and catastrophic failure for aerospace, automotive, construction, and many other industries. Let’s break down some of the best rubber and performance plastics that offer superior fire- and flame-resistant properties.
5 Different Fire-Resistant Rubber Materials
Silicone
Silicone is a high-performance rubber that boasts several fire-resistant features. Silicone boasts notably high temperature resistance and flame-retardant qualities that make it more difficult to ignite. It is also non-toxic and releases lower levels of smoke compared to other compounds when it does ignite.
While silicone already features ample fire-resistant characteristics, it can be formulated to meet even stricter requirements. Silicone can become flame retardant with additives, with some products receiving UL94 V-0 certification according to the UL94 (USA) standards for flammability classification.
Neoprene
Neoprene is one of the best rubber options for fire and flame resistance. Neoprene offers better flame retardant and self-extinguishing characteristics than exclusively hydrocarbon-based elastomers and has a fairly high temperature range. It can also be certified to meet the following standards:
- ASTM E162 (surface flammability)
- SMP800C (toxic gas generation)
- ASTM C1166 (flame propagation)
PVC
While technically a thermoplastic, PVC offers several benefits that make it attractive for many parts, including those that require fire prevention properties. PVC, also known as polyvinyl chloride, naturally has high chlorine content that gives it inherent flame-retardant capabilities. These properties make PVC difficult to ignite – and even if it does, it won’t continue to burn without a powerful external flame present.
EPDM
Standard EPDM is highly flammable, but it can be modified to improve its flame-resistance qualities. Additives, such as a flame retardant, can drastically reduce EPDM’s flammability in addition to heat and smoke release. These custom compounds can also meet specific industry performance criteria, such as:
- UL94-VO (fire safety regulations)
- ASTM E162 (surface flammability)
- ASTM C116 (flame propagation)
Viton
Viton is generally regarded as one of the more fire-resistant rubber compounds available. It’s tremendous heat resistance and low burning characteristics make Viton inherently more resistant to flame and combustion caused by high temperatures than other, non-fluorinated hydrocarbon rubbers. These qualities make it ideal for parts like firewall seals and other demanding solutions for applications.
Of course, every material has its limit. If Viton does catch fire, it can release hydrogen fluoride into the air. As such, plan accordingly to ensure that you don’t need a more specialized solution for these extreme scenarios.
Invest in Quality Fire-Resistant Rubber Parts Made to Your Precise Part Needs
Selecting the right fire-resistant rubber material is a nuanced decision that requires careful consideration of environmental conditions, specific application requirements, and potential performance limitations. While each material we've discussed offers unique advantages, the key is to match the material's inherent characteristics with your precise part needs.
Need to invest in part solutions based on your design specifications and budget? Give us a call at 800-969-6242 or contact us online to talk to one of our experts and your application.
