Hot-selling FKM NBR seal gaskets/square rubber washers

Custom seal gaskets in FKM or NBR can be developed as square rubber washers for a defined interface. The two materials are alternative configurations, and their selection should reflect the actual contact medium and operating conditions. The square profile needs to match the joint independently of that compound choice.

When evaluating material versions, keep the mating parts and closing arrangement consistent. Differences in the rubber can affect how the gasket sits and deforms, even if its loose dimensions are identical. The side lengths, corner radii, and thickness should provide continuous support without leaving folded material or an exposed sealing gap.

Keep each material version clearly identified during assembly and replacement. Color or a similar surface feel is insufficient to distinguish a specified compound. Clean the seat before fitting and inspect any area that damaged the previous gasket. The final connection must be assessed under its intended exposure rather than assigned a universal sealing or temperature capability from the FKM or NBR name alone.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Differences in the rubber can affect how the gasket sits and deforms, even if its loose dimensions are identical.

Custom dimensions

The side lengths, corner radii, and thickness should provide continuous support without leaving folded material or an exposed sealing gap.

Fit & assembly

Clean the seat before fitting and inspect any area that damaged the previous gasket.

Use & inspection

Keep each material version clearly identified during assembly and replacement.

Photos illustrate structure or material only. The side lengths, corner radii, and thickness should provide continuous support without leaving folded material or an exposed sealing gap. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.