A gun applied easily to use one part polyurethane based expanding foam for general construction and home use. Arc Gun Grade Foam is a one component, self-expanding, ready to use polyurethane foam, which contains propellants which are not harmful to the ozone layer and where the canister is provided with a thread so it can be used on a gun.Excellent adhesion on most substrates (except Teflon, PE and PP) . High Thermal and acoustic insulation. Very good filling capacities . Excellent mounting capacities.  Excellent stability (no shrink or post expansion) . Mould-proof & Waterproof. Overpaintable.