Alvin’s Weld Thru Weldable Primer is available in aerosol cans, quarts and gallon containers. Primer is applied to any metal surface and provides a weldable rust proof coating and will ensure quality welds. This paint reduces porosity and pin-holing. This versatile primer can be applied to any metal surface and will provide a zinc coating and will prevent the formation of rust and corrosion during extended periods of time.