Custom food grade silicone rubber washer/NBR rubber gaskets

NBR rubber gaskets and silicone washer configurations need to be selected for the medium and conditions at the joint. The material families are not interchangeable simply because both can be molded into a similar ring. Food-related use, oil exposure, cleaning, and temperature each require attention to the selected formulation and finished application.

Define the seating area alongside those material requirements. The inside opening must preserve the intended passage, while the outside profile and thickness need adequate support between the mating parts. The fastening arrangement should provide suitable compression without pushing the rubber into an unsupported gap.

Evaluate the complete connection with the intended material and exposure rather than transferring results from a different gasket option. Before assembly, keep the faces clean and check for edges that could damage the ring. On disassembly, inspect the contact pattern and any swelling, cuts, or extrusion. Recurring damage should be traced to the joint geometry or exposure as appropriate; replacing a gasket solely by matching its dimensions may preserve the original problem.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. The fastening arrangement should provide suitable compression without pushing the rubber into an unsupported gap.

Custom dimensions

NBR rubber gaskets and silicone washer configurations need to be selected for the medium and conditions at the joint.

Fit & assembly

Before assembly, keep the faces clean and check for edges that could damage the ring.

Use & inspection

Recurring damage should be traced to the joint geometry or exposure as appropriate; replacing a gasket solely by matching its dimensions may preserve the original problem.

Photos illustrate structure or material only. The inside opening must preserve the intended passage, while the outside profile and thickness need adequate support between the mating parts. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.