What does automotive primer mean?

2 Answers
Bella
07/24/25 2:18am
Automotive primer is the first layer of paint directly applied to the surface-treated metal parts of a vehicle. It serves as the foundation of the entire coating system. In terms of design, the primer must have excellent adhesion to the substrate and good compatibility with the intermediate or top coats applied over it. Additionally, it must possess strong anti-corrosion, anti-rust, oil resistance, chemical resistance, and water resistance properties. Solvent-based automotive primers primarily use nitrocellulose resin, epoxy resin, alkyd resin, amino resin, or phenolic resin as the base material. Pigments typically include iron oxide red, titanium white, carbon black, and other pigments and fillers. The application methods for automotive primers include spraying and dip coating.
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TuckerDella
08/10/25 9:57pm
The automotive primer is the first layer of paint applied to the car during manufacturing. It adheres directly to the metal surface of the body, acting like a foundation specifically designed to prevent rust and corrosion. Without this layer, the car would rust quickly when exposed to water or moisture, and over time, the entire paint surface could bubble and peel. If small stones or branches scratch the car during daily driving, exposing the dull gray primer, it's important to be cautious and promptly touch up the paint to prevent rust spots from spreading. Otherwise, repairs can be costly and labor-intensive. It's recommended to pay attention to the details of the car body during maintenance and avoid using overly strong cleaning agents that could damage the primer.
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