Success Story

Enclosure Units

General Industrial

The Challenge

The function of a seal for an industrial enclosure is to safeguard electronic components against dust, moisture, and wind-driven rain. These enclosures provide long-term protection for the sensitive electronics that they contain, and can be found inside buildings as well as outdoors.

Gaskets and seals must pass rugged weather-ability requirements and perform over a broad temperature range. They must also resist compression set which would compromise the electrical components inside the unit.

Each enclosure unit is designed differently, requiring gasketing and sealing materials of different firmness and thickness combinations. A seal must conform well to the mated surface while also maintaining a low closure force in order to prevent bowing.

Several tests help in determining the usefulness of the gasket in final assembly. These tests on the gasket include Compression Set, Compression Force Deflection, UL JMST2 , UL JMLU2 (component gaskets and seals), and UL94 for flammability.

The Rogers Solution

The following PORON® and BISCO® materials are commonly used as gaskets and seals in enclosure units:

  • PORON® Polyurethanes 4701-30, 40, 41, and 50 Grades
  • BISCO® Silicones HT-800 and BF-1000 Grades

These formulations are available in various firmness and thickness combinations. Common thicknesses used in these applications are 4.78 mm (0.188"), 6.35 mm (0.250"), 9.53 mm (0.375"), and 12.7 mm (0.500").


  • Excellent compression set resistance guarantees long-term sealing performance Multiple thickness and firmness combinations to accommodate different design configurations
  • Temperature performance between -40°C to 90°C (Polyurethane) and -55°C to 200°C (Silicone)
  • Polyurethane materials conform to UL JMST2 (component gasket and seals) and Silicone materials conform to UL JMLU2 (component gasket and seals
  • PORON® materials and several BISCO® materials meet UL 50E (periodic re-compression) rating

View All Success Stories


Elastomeric Material Solutions

Find local representatives for personalized support.