GRP Body Deadener Gun For underbody seal and sound deadener. Commonly known as a Shultz Gun. Fitted with a flow adjuster. Comes with a 50cm flexible tube allowing fish oil or cavity wax to be sprayed into sill cavities, chassis rails, wheel arches. For use with 1 litre cavity wax, underbody spray, stoneguard and seam sealer. Operating pressure 3 - 8 bar, maximum 10 bar. Air inlet 6mm.