Difference between NBR and EPDM

Foam tapes are a type of adhesive tape that has a foam core, which provides cushioning and insulation. They are commonly used for sealing, weatherstripping, and vibration dampening in a variety of applications, such as automotive, HVAC, and construction.

There are several types of rubber materials that can be used to make foam tapes, each with its own unique properties and characteristics that make them suitable for different applications. Among them, NBR (Nitrile Butadiene Rubber) and EPDM (Ethylene Propylene Diene Monomer) are both types of foam that are used in a variety of applications, but they have different properties and are suited for different uses.

NBR foam tape: Known for its excellent oil and fuel resistance, making it a popular choice for automotive and industrial applications. It also has good resistance to weathering and ageing, making it a good option for outdoor use. NBR foam is often used in gaskets, seals, and insulation.

EPDM foam tape: Known for its excellent resistance to ozone and weathering and has good chemical resistance and is suitable for use in harsh environments. EPDM foam is often used in roofing, insulation, and sealing applications.

Differences between NBR and EPDM

Temperature range

NBR foam can withstand temperatures up to around 120°C, while EPDM foam can withstand temperatures up to around 150°C. This makes EPDM foam more suitable for high-temperature applications.

Compression set

NBR foam has a higher compression set than EPDM foam, which means that it will retain less of its original shape after being compressed for a period. This can be an important factor to consider when choosing a foam for an application that requires it to maintain its shape over time. EPDM has a higher level of flexibility and can be stretched up to 400% of its original size, while NBR is limited to around 200%.

Chemical resistance

NBR has better chemical resistance than EPDM and is resistant to a wide range of oils, fuels, and chemicals, making it suitable for automotive and industrial applications. On the other hand, EPDM is not as resistant to chemicals, but it has good resistance to ozone, weathering, and UV radiation.

In terms of cost, NBR foam tape is generally less expensive than EPDM foam. This can make it a more cost-effective option for certain applications. Reach out to Delta Duct for reliable foam tapes and to know which suits best for your business!