3X PROMATIC STONECHIP UNDERBODY BLACK COATING 1L + UNDERBODY COATING GUNPROMATIC US-1 IS A THICK,BITUMINOUS BASED PRODUCT THAT IS IDEAL FOR VEHICLE UNDERBODY COATING TO GIVE BOTH RUST PROOFING AND SOUND DEADENING PROPERTIESTHIS PRODUCT STAYS FLEXIBLE WHEN CURED AND DOES NOT SAG WHEN APPLIEDAPPLIES IN ONE COAT WITHOUT DRIPPING.PROTECTS AGAINST CORROSION AND STONECHIP PRODUCT IS OVER PAINTABLEAPPLY WITH A CLEAN UNDERSEAL GUN OR BRUSHThis gun simply screws onto a standard tin of underbody coating material and creates a venture action that sucks up the material and pushes it through the gun nozzle.An absolute must-have for anybody or workshop applying underbody material to vehicles, also a great tool for DIY and classic car restorers.Comes complete with plastic extension probe for reaching into those difficult to access areas.Inlet Thread Size: 1/4" BSPOperates at 90PSI/6BAR