Custom made UL flame retardant insulation gasket

A custom insulation gasket separates or seals mating areas while meeting the material requirements of its intended assembly. If flame retardancy is part of that requirement, the selected rubber and finished geometry need to correspond to the specified application. Specify the required flame classification and electrical separation characteristics for the intended material, thickness, and assembled configuration.

Define the surfaces that the gasket separates and the openings that must remain aligned. Its thickness and supported area should suit the closed joint without leaving an unsupported edge that can fold or be cut. Cut or molded rubber construction can be developed around that outline.

Keep insulation, sealing and flame behavior as distinct requirements during selection. Passing a fit check does not establish electrical separation performance, and a material choice should not be changed solely because another rubber is the same color. Evaluate the finished assembly with the intended compound and mating conditions.

During installation, remove conductive debris, sharp fragments and other contamination from the seating area. Bring the joint together without shifting the gasket over an opening or fastener. Inspect a removed part for punctures and local crushing before reuse. Replace damaged material with the evaluated construction, and address any sharp or unsupported mating feature that caused the damage.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Choose firmness for the insulation gasket contact and available compression space; any flame requirement must be evaluated for the selected construction separately.

Custom dimensions

Specify the required flame classification and electrical separation characteristics for the intended material, thickness, and assembled configuration.

Fit & assembly

Passing a fit check does not establish electrical separation performance, and a material choice should not be changed solely because another rubber is the same color.

Use & inspection

Replace damaged material with the evaluated construction, and address any sharp or unsupported mating feature that caused the damage.

Photos illustrate structure or material only. If flame retardancy is part of that requirement, the selected rubber and finished geometry need to correspond to the specified application. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.