Transtar’s Weld Through Primer is a ready-to-use primer to aid in MIG/TIG welding. Weld Through Primer offers high resistance to salt and water, providing excellent corrosion protection to the weld area. It is quick drying and water-resistant after 15 minutes. It is formulated to be V.O.C. compliant in California. It provides superior conductivity for welding applications and has minimal spatter during welding. Comes in zinc and copper formulations.