High adhesion, super conductive Zinc rich Weld Through Primer. Effective rust protection for SPOT, MIG and TIG welding. High purity zinc gives excellent conductivity. Fast drying formulation speeds up the welding process. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.