HTS is used with conventional or semi-efficient sulfur based vulcanization systems to generate thermally stable hybrid crosslinks which provide excellent dynamic flexibility in NR, IR, SBR, BR and blends of these polymers. HTS is used in SBR based compounds to modify the viscoelastic dynamic properties. HTS is used as an adhesion promoter to enhance the adhesion between rubber compounds and brass plated steel reinforcing materials. A slight reduction in scorch safety and modulus and a slight increase in cure time may be observed when using HTS in various compounds. HTS is non-staining and non-discoloring in most compounds.