3M Weld-Thru II Coating 5917 is a sprayable - weldable - corrosion-resistant coating designed to prevent corrosion from forming between two welded metal surfaces. This product can be used to prevent corrosion on metal surfaces that will not be receiving any further treatment including body filler - primer and paint. Dries fast with minimum spatter and meets MIR requirements. This aerosolcoating is designed to be applied to metal surfaces prior to welding to provide corrosion protection after welding.