GripTide Primer is a 2.1 VOC compliant, two-component primer that provides bare metal adhesion and filling in one product. Provides excellent corrosion control and outstanding adhesion on metal, fiberglass, and aluminum. Builds quickly and sands easily. Excellent color holdout. Rollable or sprayable. Adheres to bare steel and aluminum, sanded OEM finish, body filler, polyester glaze, SMC, fiberglass, and gelcoat. Requires mixing with GripTide Primer Activator (item #1083504 sold separately) – 4 parts Primer (qt.) to 1 part Activator (1/2 pint).