Heat resistant rubber washer round silicone washer

A heat resistant rubber washer places an elastomer ring between mating surfaces in an assembly. The round form surrounds a central opening while providing a compliant contact area. ETOL lists silicone and other compounds and offers custom dimensions, color and hardness for the selected application.

For a warm joint, consider the temperature at the washer itself, including heat transferred through the surrounding hardware. Evaluate the washer through the intended temperature range in its fitted condition. The compound should be chosen for the operating conditions together with the liquids or cleaning substances that may contact it.

Mechanical compression is equally important. The inner opening must clear the intended shaft or fastener, and the outer ring must have adequate support from the mating faces. Tightening until the rubber squeezes out can reduce its useful contact and alter the joint spacing. Evaluate the installed thickness rather than only the thickness of a loose washer.

Inspect the washer after the assembly has experienced its intended operating cycle. Look for displacement, permanent flattening or contact marks from an uneven face. When replacing it, preserve the specified dimensions and compound so the joint is not changed merely because another ring fits over the same fastener.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. Match silicone firmness with the supported outer ring and shaft clearance, checking that compression does not push the washer into the central opening.

Custom dimensions

Evaluate the installed thickness rather than only the thickness of a loose washer.

Fit & assembly

A heat resistant rubber washer places an elastomer ring between mating surfaces in an assembly.

Use & inspection

The compound should be chosen for the operating conditions together with the liquids or cleaning substances that may contact it.

Photos illustrate structure or material only. The inner opening must clear the intended shaft or fastener, and the outer ring must have adequate support from the mating faces. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.