The Transtar 4603 2 in 1 Primer is a gray aerosol primer designed for convenient priming of metal and plastic parts. It provides corrosion resistance, seals out moisture, and creates a smooth base for topcoat application. The primer offers excellent adhesion on both flexible and rigid substrates and features fast drying performance with superior fill and build. It sands easily and is compatible with most automotive paints. Ideal for automotive repair, refinishing, and surface preparation on metal or plastic components.