Skyprene Y-30 Mercaptan modified polychloroprene rubber Tosoh Rubber - Elastomer >> Chlorinated rubber / Chloroprene, CR ADHESIVE Skyprene polychloroprene rubbers are often specified by design engineers beacuse of their superior properties, such as their resistance to cold, hear, abrasion, ozone, oil and chemicals. Used in adhesives. Medium crystallization rate. Mercaptan modified polychloroprene rubber. Possesses medium crystallization rate. Used for adhesives. Offers resistance to cold, hear, abrasion, ozone, oil and chemicals.