High quality flexible rubber seal ring/silicone gasket/rubber washer

A flexible rubber seal ring should reach its working position without having to pass over a damaging obstruction. In some assemblies, a shoulder or attached fitting is wider than the final seat. This makes the fitting path a separate design question from the dimensions of the groove where the ring eventually rests.

Consider the assembly order before choosing the profile. It may be practical to position the ring before the larger adjoining part is attached, provided that sequence belongs to the equipment design. Pulling a small ring over a sharp or oversized feature can nick its inner edge, leaving damage that is concealed once it reaches the seat.

Custom molding allows the diameter and working section to match the intended installation. Choose the material around the actual service exposure rather than using extra flexibility as a way around an unsuitable fitting route. After positioning, check that the ring has relaxed evenly around its circumference. A locally twisted or stretched region should be corrected before closure, and a cut ring should be replaced instead of hidden beneath the mating component.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. A flexible rubber seal ring should reach its working position without having to pass over a damaging obstruction.

Custom dimensions

Custom molding allows the diameter and working section to match the intended installation.

Fit & assembly

In some assemblies, a shoulder or attached fitting is wider than the final seat.

Use & inspection

Choose the material around the actual service exposure rather than using extra flexibility as a way around an unsuitable fitting route.

Photos illustrate structure or material only. A shoulder wider than the final seal seat can change the order in which a ring must be fitted. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.