Scotch-Weld™ AC77 is a single component primer for use in conjunction with Scotch-Weld™ cyanoacrylates. The heptane solvent carrier has zero Ozone Depletion Potential. Scotch-Weld™ AC77 enables the bonding of difficult to bond plastics such as polypropylene, polyethylene and silicone rubber by increasing the surface energy. Scotch-Weld™ AC77 acts as an accelerator with cyanoacrylate adhesives. Cure speeds of under 5 seconds are achieved with most grades.