Designed for application before welding works, HB Body's P311 Black Zinc Welding Primer is a fast-drying conductive primer ideal for both MIG and spot welding and offers excellent physical and anti-corrosive properties. This primer effectively protects metals and comes in a 400ml aerosol can for quick, easy, and consistent application. Remember to shake the can for two to three minutes before use and spray from a distance of 20-30cm.