Transtarís 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 (MIR =0.9). It provides superior conductivity for welding applications and has minimal spatter during welding.