SEM Products 39683 Self Etching Primer Gray 20 oz Aerosol Can

SEM Products 39683 Self Etching Primer in Gray is a professional-grade, aerosol-applied primer designed to chemically bond to bare metal, aluminum, and fiberglass substrates. Unlike conventional primers, this self-etching formula uses a mild acid etch technology to bite into the surface, creating a superior mechanical and chemical bond that helps prevent rust and corrosion while promoting topcoat adhesion.

Key Features:

• Self-etching formula bonds directly to bare metal, aluminum, and fiberglass without the need for a separate etching wash
• Provides an excellent foundation for body fillers, glazes, and finish coats
• Helps prevent rust and corrosion on bare metal surfaces
• Fast-drying aerosol formula for easy, spray-on application
• Gray tinted finish for easy visual coverage confirmation
• Convenient 20 oz aerosol can for professional or DIY use
• Compatible with lacquer, enamel, and urethane topcoats

SEM Products 39683 Self Etching Primer is ideal for use in automotive body repair, restoration, and refinishing applications. It is suitable as a first-step primer over cleaned and prepped bare substrates before applying surfacers, sealers, or direct-to-topcoat finishes. Trusted by professional body shops and detailers for decades, SEM primers are formulated to meet the demands of the automotive refinishing industry.