High quality molded rubber seal caps/waterproof silicone plugs

Custom molded rubber seal caps should follow the complete mating profile, including any depth change beneath the visible rim. A head that covers the opening neatly can still conceal a retained body that is too long, too short or stopped by an internal feature.

Select the silicone or other rubber formulation for the operating exposure. Develop the body and grip around the actual assembly, and evaluate any water-sealing requirement with that finished interface. A waterproof description does not define a general pressure or ingress rating for every custom cap.

Trial the part in the designated opening and inspect its retained position as well as the visible perimeter. Do not push the head flat to compensate for an unsuitable body. During maintenance, compare the opening with the design dimensions before replacing a distorted cap. Correct residue or damage at the seat so the new component can occupy the position it was intended to reach rather than reproducing the previous uneven contact.

Material options

Custom silicone or rubber formulation; select the compound alongside the mating geometry.

Hardness selection

Silicone: 20–80 Shore A; solid rubber: 30–90 Shore A. Develop the body and grip around the actual assembly, and evaluate any water-sealing requirement with that finished interface.

Custom geometry

Custom molded rubber seal caps should follow the complete mating profile, including any depth change beneath the visible rim.

Fit evaluation

Trial the part in the designated opening and inspect its retained position as well as the visible perimeter.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. Custom molded rubber seal caps should follow the complete mating profile, including any depth change beneath the visible rim. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.