- Product description
Sika® Activator-309 P is a solvent-based colorless adhesion promoter that reacts with moisture to deposit active groups on the substrate. These groups act as a bonding agent between substrates and primers or sealants/adhesives. Sika® Activator-309 P is specifically designed to treat pinchweld substrates such as paint, chopped polyurethane, etc. prior to the application of Sika's polyurethane adhesives.