Waterproof Rubber Washer/ Rubber Flange Washer

A Rubber Flange Washer places a shaped rubber contact layer within a matching flange arrangement. The outer area must be supported where compression is applied, and the central opening should clear the intended passage or fitting. A washer shifted off center can have different contact conditions on opposite sides of the same joint.

Select the material and dimensions for the actual connection and water exposure. The word waterproof does not establish a pressure or ingress rating for an unspecified assembly. The washer, mating faces and fastening method need to be evaluated together under the intended conditions.

Before installation, inspect the flange for residue, scratches and uneven contact areas. Position the washer centrally and bring the joint together using the specified sequence. Look for pinched material or an edge that moves outward during tightening. If leakage occurs, examine the seating and alignment as well as the rubber. Replacing a washer without correcting a damaged flange can leave the same irregular contact in the repaired joint.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. The outer area must be supported where compression is applied, and the central opening should clear the intended passage or fitting.

Custom dimensions

A Rubber Flange Washer places a shaped rubber contact layer within a matching flange arrangement.

Fit & assembly

If leakage occurs, examine the seating and alignment as well as the rubber.

Use & inspection

Before installation, inspect the flange for residue, scratches and uneven contact areas.

Photos illustrate structure or material only. A washer shifted off center can have different contact conditions on opposite sides of the same joint. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.