418 – Natural Rubber Sponge (NR)

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.

This sponge structure offers good compression set characteristics, and typically rebounds faster than closed cell sponges. We offer a range of materials from soft to extra firm and these can be classed VO fire rated or with Cryogenic insulation options.



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 (Eg: A strap on a handbag).

Our RefCompression Deflection KPa Density Kg/m³ Strength KPa Elongation % ASTM D 1056 Colour
418 - 24244002762501A1Black/Tan

Full data sheets for all grades are available on request.

* The information above is supplied in good faith and believed to be correct. This information is supplied upon the condition that persons receiving this will make their own determination as to its suitability for their purposes prior to use. EMI makes no representations or warranties, either expressed or implied with respect to the information or the product to which this information refers.