Transparent, colorless, ethyl-based general purpose instant capillary adhesive.LOCTITE® 420 is a transparent, colorless, general purpose, capillary, ethyl-based instant adhesive. Suitable for metals, rubbers and plastic, it is also suitable for polyolefins in combination with Primer LOCTITE® SF 770 or LOCTITE® SF 7239. It has a fixture time of 5 - 20 secs.