... 3.eco-friendly,slight odor, non--toxic Insoluble sulfur (IS series):1.a new rubber vulcanizing agent2.inflammable yellow powder ... offer all types of superior insoluble sulfur, such as IS-HS8010, IS-HS7520, IS-HS7020, IS-HS6033; IS60, IS90 and so on. Specification: ... due to the blooming phenomenon,Pollution between rubber and die is thus prevented. b) No transfer in an adjacent adhesive ...