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Common Name Polysulfide
ASTM D-2000 Classification BK
Military (MIL STD 417) SA
Chemical Definition Polysulfide
General Characteristics
Durometer Range (Shore A) 40 - 80
Tensile Range (P.S.I.) 800 - 1200
Elongation (Max. %) 300
Compression Set Poor
Resilience - Rebound Fair
Abrasion Resistance Poor
Tear Resistance Poor
Solvent Resistance Excellent
Oil Resistance Excellent
Low Temperature Usage (F°) -65°
High Temperature Usage (F°) to 160°
Aging Weather - Sunlight Good
Adhesion to Metal Poor
Polysulfide is generally resistant to most ozone, oils, aromatic hydrocarbons, esters, ketones and thinners.
Polysulfide is not recommended for service where it is exposed to mercaptans, chlorinated hydrocarbons, nitro hydrocarbons, esters, amines and heterocyclics