Weld Seal (ASW) - Heavy duty, zinc rich, fast drying weld-thru primer. Restores factory zinc coatings on inner panels and underbody areas. It is highly resistant to salt corrosion and water. Weld Seal dries to the touch in about five minutes 12 oz. Aerosol Prima Weld (BPW) - Weld thru primer. Brushable, fast drying, high zinc formula. Restores factory zinc coatings. It is highly resistant to salt corrosion and water. 8 fl oz.