General Sealing Products / Sponge, Foam & Cellular Grades

419 Natural/SBR Sponge (NR/SBR)

Custom Grades including MilSpec, Def STAN, NSN, AS & DTD available. Below is a sample of common grades. Contact us for your unique requirements.

Applications include Expansion joints, gap fillers, cushioning, vibration absorption, and non-skid padding. It also used as die ejection packing in steel rule, rotary and Class A dies, Drum gaskets and applications where the material is sewn in (Example: A strap on a handbag)

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Temperature Range (depending on grade):

Constant Low: -40°C Intermittent Low:

Constant High: +70°C Intermittent High: +80°C


Natural Rubber sponge has a unique cell structure when compared to most other blown rubber sponges. When blown you get an Open Cell structure composed of connected cells that allow air or gas to pass through when compressed but if you blend SBR without you can create a closed cell structure that still retains the better characteristics of Natural.

This new sponge structure offers good compression set characteristics, and typically rebounds faster than most closed cell sponges.

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