curing agent HVA-2, also known as vulcanizing agent PDM ,, is a co-crosslinking agent. But HVA-2 contains no sulfur, is non-sulfur curing agent, can completely replace all of the sulfur vulcanizing agent, it is a high-end vulcanizing agent. Can be used as sulfur or peroxide crosslinking aid, currently in the top wire and cable CPE, with BIPB + more PDM sometimes PDM can also be done alone vulcanizing agents, peroxides avoid odor. Vulcanizing agent HVA-2 uses a very wide range, it can be used for conventional synthetic gums, such as: above EPDM rubber, nitrile rubber, chloroprene rubber, natural rubber, iso-diene rubber, etc., can also be used for special glue, such as: chlorosulfonated polyethylene, polyurethane, acrylic resin, fluorine rubber, silicone rubber or the like, particularly in the dielectric properties of silica above is superior.