Customized EPDM NBR oil resistant rubber washer for sealing

An oil resistant rubber washer should be selected for the actual oil and temperature at its joint. EPDM and NBR options need to be evaluated for their specific service conditions rather than treated as interchangeable materials. The fluid can include additives or residues from cleaning, so the relevant exposure is the mixture that reaches the finished washer.

Match the face dimensions and thickness to the supporting surfaces. The washer should receive the intended compression without spreading into an unsupported gap or blocking a passage. Include changes in the joint gap during operation where heating or movement affects the contact.

Install on clean mating faces and keep the rubber centered as the joint closes. During maintenance, inspect for swelling, hardening, cuts, or material pushed beyond the seat. A changed oil specification is a reason to revisit the compound choice even if the washer dimensions remain correct. Preserve the selected formulation in replacement parts so the fit and material response remain coordinated at the same connection.

Material options

EPDM / NBR. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. The washer should receive the intended compression without spreading into an unsupported gap or blocking a passage.

Custom dimensions

Match the face dimensions and thickness to the supporting surfaces.

Fit & assembly

Install on clean mating faces and keep the rubber centered as the joint closes.

Use & inspection

During maintenance, inspect for swelling, hardening, cuts, or material pushed beyond the seat.

Photos illustrate structure or material only. An oil resistant rubber washer should be selected for the actual oil and temperature at its joint. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.