Struktol SCA 985 PL Bi-functional disulfide organosilane Struktol Crosslinking / Coupling / Curing Agents >> Silane Rubber - Elastomer (Chloroprene, Butyl …) STRUKTOL ® SCA 985 COUPLING AGENT A bi-functional disulfide organosilane for the rubber industry. STRUKTOL ® SCA 985 is used to improve the reinforcing capability of fillers with silanol groups on their sur- face (e.g., silicas, silicates, clays, etc.). STRUKTOL ® SCA 985 offers improved scorch safety during mixing due to its disulfide composition. Bi-functional disulfide organosilane. Used as a coupling agent for rubber industry. Improves reinforcing capability of fillers. Offers improved scorch safety during mixing.