High quality long-shaped silicone gasket/rubber washer for machine

A long-shaped silicone gasket follows an extended machine joint where the sealing path continues between widely separated areas of support. Its outline can accommodate the opening and the fastening positions, but the long dimension makes flat placement and even closure especially important. A small shift at one end can move an opening out of alignment farther along the part.

Lay out the gasket against the full mating surface, checking end shapes and hole spacing before assembly. Consider how the adjoining cover bends between fasteners. Extra gasket thickness cannot reliably correct a closing face that leaves uneven compression along its length, and it may alter clearance at the more tightly supported ends.

During fitting, place the entire part without pulling it lengthwise to align the last hole. Bring the cover down evenly, keeping the gasket supported until the locating features engage. Check exposed edges for waves or sections displaced from the contact path.

For maintenance, compare wear along the full length instead of inspecting only the ends. Local flattening beside fasteners and a less compressed center can indicate that the joint needs a more even closing condition. Clean the mating faces without gouging them and choose the silicone formulation around the actual medium and temperature. Store replacement gaskets flat or otherwise supported so a long unsupported section does not acquire a difficult installation shape.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Local flattening beside fasteners and a less compressed center can indicate that the joint needs a more even closing condition.

Custom dimensions

Lay out the gasket against the full mating surface, checking end shapes and hole spacing before assembly.

Fit & assembly

During fitting, place the entire part without pulling it lengthwise to align the last hole.

Use & inspection

For maintenance, compare wear along the full length instead of inspecting only the ends.

Photos illustrate structure or material only. Local flattening beside fasteners and a less compressed center can indicate that the joint needs a more even closing condition. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.