Viton™ VC-7, known as Diak™-7, is a reactive polyfunctional triazine cogent used with G-type peroxide-curable fluoroelastomer compounds. The Viton™ G-family of fluoroelastomer mixes cannot be cured with peroxide; the process requires a curative coagent. In combination with peroxide, Viton™ VC-7 fluoroelastomer curing agent provides excellent tensile properties and high-temperature compression set resistance. The typical usage level for Viton™ VC-7 is 2.5 to 4 phr.

Viton™ VC-7 fluoroelastomer curative serves a different formulation purpose than the other Viton™ curing agents. Unlike VC-1 and VC-3 diamines that help the A-, B-, and E-types of Viton™ fluoroelastomers, Viton™ VC-7 is specialized for G-types as the suggested curative for all Viton™ GF-200S compounds. Viton™ VC-7 has a melting point that can be either solid or liquid, depending on the storage conditions. Viton™ VC-7 can be blended with a filler, additional polymer additives, and polymer resin such as FKM (fluoroelastomer), ACM (alkyl acrylate copolymer), AEM (ethylene acrylic rubber), and ECO (Epichlorohydrin rubber).