This Faithfull high quality Foam (Spurt) Gun is designed for use with standard 500/750ml gun grade Polyurethane pressurised expanding foam canisters. The gun has a sprung trigger mechanism and flow adjuster knob to ensure fine control over the foam output, and to provide a clean, even bead for the accurate installation of the foam which helps to reduce waste. The barrel is hermetically sealed once the trigger has been released to prevent the hardening of the foam when left in the gun. The Foam Gun has Teflon coated needle and canisters fitting valve and a stainless steel barrel to help make cleaning the gun easier. It is supplied complete with two types of additional plastic extension barrels to give better access when used in certain applications. Ideal for the following applications:Installation of door and window frames.Filing and sealing of cavities and joints.Pipe or cable penetrations in walls.Sealing joints in wall insulation sheets. Supplied with:2 x Long plastic extension barrels2 x Short plastic narrow access barrels