Best Automotive Primers for Filling Deep Scratches (2026)
We ranked products by primer type, surface compatibility, build/fill capability, ease of application, and per-unit material value
The Verdict
- Best Overall: Dupli-Color Filler Primer Gray 11 oz aerosol — Filler primer with high-build automotive formulation for filling deep scratches and imperfections.
This roundup covers automotive primers suited for filling deep scratches, comparing aerosol filler primers and high-build urethane kits by fit and value. Picks were chosen based on build type (aerosol vs urethane), surface compatibility, ease of use for repair vs repaint, and overall material value
Top Picks
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1
Best Overall Dupli-Color Filler Primer Gray 11 oz aerosol
Filler primer with high-build automotive formulation for filling deep scratches and imperfections. Fast-drying, sandable finish promotes top coat adhesion and smooth, rust-resistant surface. Customers note ease of sanding and value, with mixed spray quality feedback
- high-build formulation
- fast-drying with 30 min touch dry
- reduces top coat issues
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2
Dupli-Color Filler Primer, Red 11 oz aerosol
Dupli-Color Filler Primer is a high-build automotive primer that fills deep scratches and imperfections and sands easily for a smooth, rust-resistant surface. It dries to touch in 30 minutes and can be handled in 1 hour; customers note it sands well and functions as a primer and filler
- fills deep scratches and imperfections
- fast-drying and sandable finish
- improves top coat adhesion
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3
U-POL 1 Gallon Urethane Primer Kit with Hardener
Best for panel restorations: one-gallon urethane primer kit with hardener for high-build filling and direct-to-metal use
High solids urethane primer with a 4 to 1 mixing ratio for direct-to-metal use. Offers excellent opacity and hiding power, with air-dry or low bake curing options. Customers note high quality, good coverage, and easy sprayability
- 3 in 1 direct-to-metal primer
- high build urethane with 4 to 1 mix
- effective opacity and hiding power