3m ac11 activator 3m ac11 ac11 is a solvent based activator formulated to increase the cure speed of cyanoacrylate adhesives it can be used to give instant on demand curing and is especially suited to use with slower high viscosity adhesives and with porous substrates where the adhesive must cure before being absorbed into the substrate 3m scotch weld cyanoacrylate activator ac11 200ml aerosol