LOCTITE® 406 / LOCTITE® SF 770 is a 2-part kit for bonding polyolefins and other low-energy surfaces. LOCTITE 406 is a transparent, ethyl cyanoacrylate-based instant adhesive for plastics and elastomeric materials that require very fast fixturing. It fixes the adhering components in seconds and hardens very quickly, forming an ultra-thin bond. Its low-viscosity nature makes it highly suitable for small gaps. LOCTITE SF 770 is a low-viscosity, aliphatic amine primer for making polyolefin and other low-energy surfaces suitable for bonding with LOCTITE 406 and other LOCTITE cyanoacrylate adhesives. It's transparent to slightly hazy and fluoresces under UV light – great for quality control.