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Basic Rubber Compounds for Gaskets

Expert Gasket & Seal provides rubber gaskets for many types of service and applications.  Here is a brief explanation of the most common rubber materials for gaskets and their intended usage.

Synthetic rubber is available in a variety of compounds for many different types of service.  The most common of these are Neoprene®, Nitrile (Buna-N), EPDM, SBR (Styrene-Butadiene), Viton® (FKM), and Silicone.

Neoprene® (Chloroprene) is the most widely known synthetic rubber.  Most chloroprene rubber compounds can be used in temperatures from -20°F to + 225°F, and in applications such as water, refrigerants, some mineral oils, and ammonia.

Nitrile (Buna-N, NBR, Acrylonitrile-butadiene) is designed for service in petroleum based fluids generally to 212°F.   It is the material of choice for most mineral oils, some fuels, and petroleum based oils & grease.  Nitrile is not compatible with glycol based brake fluid, phosphate-ester fluids, and high aromatic content fuels.

EPDM (Ethylene Propylene) is generally good within a temperature range of -50°F to +300°F and is the preferred compound for hot water, steam, glycol based brake fluids, alcohols, ketones, and phosphate-ester hydraulic fluids.  EPDM is not compatible with petroleum based fluids.

SBR (Styrene-Butadiene) is the oldest synthetic rubber and was designed to replace natural rubber.  It has a temperature range of -40°F to +180°F and is most commonly used in water applications.  The most well known form of SBR used in gaskets is known as “Red Rubber”, named for it’s reddish-brown color.

Viton® (FKM, Flurocarbon) has excellent resistance to a wide variety of chemicals within a temperature range of -20°F to +400°F.  Viton® is compatible with some acids, aromatic hydrocarbons (benzene, toluene) and methanol based fuels.  Viton® also works well in high vacuum applications.

Silicone Rubber has excellent low and high temperature resistance (-75°F to +450°F) and is particularly ozone and weather resistant.

There are other compounds, besides these, available for gasket usage.  Please contact Expert Gasket & Seal before choosing a rubber gasket.  We will make sure you have the best, and most cost-effective compound for your rubber gasket application.

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Expert Gasket & Seal, LLC
9011 Freeway Drive, #5
Macedonia, OH 44056
Phone: (330) 468-0066
Toll Free: (800) 956-8766
E-mail: info@expertgasket.com
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