Rubber Washer Reference Site

Santoprene Washers For Resistance And Security

Santoprene washers are made from a specialized material that's categorized as thermoplastic vulcanizates. This material is very similar to vulcanized rubber and other elastomer polymers. Its flexibility, grip, and cushioning capabilities mean that washers made from Santoprene will offer advantages that are consistent with standard rubber washers, only with extended durability.

Santoprene washers are used in a variety of industrial placements, including those that are structural and equipment based. Excellent sealing performance and long-term structural integrity make these washers suitable for use in plumbing, HVAC connections, and a variety of processing equipment. They are very effective for containing the flow of liquids and gases, thus contributing to air- and water-tight joining of parts.

Different grades and coatings on Santoprene washers will amount to different frictional coefficients and the potential to grip or bond parts in place. Santoprene washers with stronger bonding capabilities can be useful for holding fastener assemblies tightly in place. This can be advantageous in applications where assemblies may otherwise loosen under the effects of vibration. Santoprene’s vibration-damping effects also contribute to this added stability and security. 

To get the best performance of Santoprene washers, sizing them correctly for the application and assembly is critical. If these washers are to be used in a gasket capacity or as a hose washer, the inner diameter and outer diameter ratio is often tighter than a washer that's used around the neck of a fastener. This extended opening is primarily required to permit the flow of air and liquid.

Santoprene washers have become a common alternative to washers made from natural and vulcanized rubber, due in part to their resistance to cracking and deterioration over longer periods of time. They are available from most fastener retailers.

If special sizes, shapes, thicknesses, or other custom requirements need to be met, it can be more economical to source washers directly from a stamping manufacturer. Santoprene is also available in a variety of different grades and with additional treatments. If washers must be made from a specific grade or with coatings, then washer manufacturers are often the better source to fulfill such requirements.

What Are Santoprene Washers Used For?

Santoprene washers are used in fastener assemblies and in connections as sealing devices. They provide flexible support, help to maintain tension, dampen vibration, and can help contain the flow of gases and liquids. They may be fitted around the neck of a fastener, such as a bolt or screw, in order to act as a buffer and pressure distribution device. They can also be used as gaskets within various plumbing, HVAC, and processing equipment connections.   

Are Santoprene Washers Chemically Resistant?

Santoprene washers offer chemical resistance that is comparable to neoprene and will retain integrity when exposed to many different types of chemicals and solvents. Aromatic solvents and halogenated organic solvents, however, may cause swelling in Santoprene. Resistance can also vary when these washers are exposed to certain caustic chemicals.  

What Are Santoprene Gaskets?

Santoprene gaskets are used to seal and contain the flow of gases and air. Gaskets are placed between a connection or at the opening of a spout or valve. They prevent leaks, contributing to an air- or water-tight part. Santoprene gaskets are similar to washers but they may feature a rounded edge like an o-ring to better adhere to any grove or gaps between surfaces. Santoprene washers used in a gasket capacity will feature a narrower ratio between the inner and outer diameter, which permits a greater flow of air and liquid through the center of the washer. 

Are Santoprene Washers The Same As Rubber Washers?   

Santoprene washers are similar to rubber washers, although Santoprene is a synthetic form of the material. Because it’s comprised of elastomer polymers, Santoprene can provide added durability and resistance to cracking over longer periods. They are frequently used as a more enduring alternative to natural rubber washers because of this added resistance.