This black SBR contains one or two synthetic fabric layers, which makes it long lasting and more resistant than the 3R 820.


Featuring a high tensile strength, it is very useful to make flange gaskets for hot water, cold water and low pressure steam piping.
The 3R825 is recommended for gasket applications up to 300 psi.


Technical Data

Polymer Type Cloth inserted SBR rubber
Color Black
Hardness (Shore A) ± 5 80
Temperature -25°C to 80°C (-10°F to 180°F)
Tensile Strength, lbs/in² 500
Elongation minimum, % 100
Compression Set Good
Abrasion Resistance Good
Tear Resistance Good
Ozone Resistance Fair
Impermeability to Gases Fair
Resistance to Dilute Acid Poor
Resistance to aromatic hydro-carbons Poor
Heat Aging Fair
N.B. The information, details and values indicated are to the best of our knowledge. We recommend to conduct tests according to local conditions. The data is subject to some variations without notice.