This material has a good resistance to alkali and acids, but its main feature is its outstanding impermeability to gases and vapors.


The 3R852 is designated for outdoor use when a product resistant to sunlight, oxidation, ozone and different atmospheric conditions is sought.


Technical Data

Polymer Type Butyl (IIR)
Color Black
Hardness (Shore A) ± 5 60
Temperature -30°C to 100°C (-20°F to 210°F)
Tensile Strength, lbs/in² 1000
Elongation minimum (%) 300
Compression Set Fair
Abrasion Resistance Good
Tear Resistance Good
Ozone Resistance Excellent
Impermeability to Gases Outstanding
Resistance to dilute acid Excellent
Resistance to aromatic hydro-carbons Poor
Heat Aging Very Good
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.