Loctite light cure adhesives loctite 195680 loctite aa 3321 is primarily designed for bonding rigid or flexible pvc to polycarbonate where large gap filling capabilities and flexible joints are desired it has excellent adhesion to a wide variety of substrates including glass many plastics and most metals the thixotropic nature of loctite 3321 reduces the migration of liquid product after application to the substrate loctite 195680 aa 3321 lc light cure adhesive for stress sensitive plasti