The Faithfull Long Barrel Foam Spurt Gun is a high-quality foam gun designed for installing door and window frames, filling and sealing cavities and joints, sealing pipe or cable penetrations in walls, and sealing joints in wall insulation sheets.The gun is compatible with standard 500ml and 750ml gun grade Polyurethane pressurised expanding foam canisters. It features a spring trigger mechanism and flow adjuster knob, to give the user precise control over the foam output, this means greater accuracy and reduced waste on the job.The barrel of the gun is hermetically sealed upon trigger release, preventing the foam from hardening inside the gun. The gun also benefits from an extra-long 500mm barrel for hard to reach places, and a stainless-steel needle to help make cleaning easier.