OP Series - Soft Material: Soft grade Open Cell Rubber Description: Soft grade Open Cell Rubber is a porous, elastic material produced from natural rubber. Features: Excellent recovery after compression, shock and sound absorption, and a non-skid surface. Applications: Used in sealing against air, dust, and moisture, vibration damping, gasketing and cushioning, and mouse pads. Open Cell Rubber is available with adhesive or plain and can be supplied in tapes, kiss-cut in rolls, or die cut into individual parts. Technical Specifications Physical Property U/M Test Method Value Notes Accelerated Aging % 7 days @ 158F 20 Change in compression deflection Compression Force Deflection PSI @25% Deflection 3.5 +/- 1.5 Compression Set % 22 hrs @ 158F; 50% Load 15 Maximum Density PCF   20 +/- 4 Elongation %   250 Minimum Maximum Temperature F   180   Minimum Temperature F   20   Resistance   Water Excellent   Resistance   Ethyl Alcohol Excellent   Resistance   Benzene Poor   Resistance   Methyl Ethyl Ketone Poor   Resistance   Glycerine Excellent   Resistance   Ethyl Acetate Fair   Resistance   Ethylene Glycol Excellent   Resistance   Oil Fair ASTM #1 Resistance   Oil Poor ASTM #3 Resistance   Paraffin Oil Fair   Shrinkage % 7 days @ 158F 2 Maximum Tensile Strength PSI   100 Minimum