How to Choose a Car Primer: A Complete Guide for 2026

Primer is the first and most important layer when painting a vehicle. It ensures paint adhesion, protects the metal from corrosion, and levels the surface. Choosing the wrong primer can ruin the entire repair.

Main Types of Automotive Primers

1. Acrylic Primer (2K)

The most popular type for bodywork repair. Mixed at a ratio of 4:1 or 3:1 with a hardener. Advantages: excellent adhesion, fast drying time (30–60 min), compatibility with most lacquers and paints. Ideal for repairing damage after filling with body filler.

Application: after body filler, before applying base coat.

2. Acid Etch Primer

Contains phosphoric acid, which etches the metal surface and forms a protective layer. Applied directly to bare metal; the coating is very thin. An acrylic or epoxy top coat is mandatory after an acid etch primer.

Application: bare metal, weld zones, sandblasted areas.

3. Epoxy Primer

The best protection against corrosion. It penetrates the micropores of the metal and creates a reliable, hermetic layer. More expensive than acrylic, but indispensable for heavily corroded surfaces or new body panels.

Application: restoration, high-corrosion-risk areas, new metal parts.

4. Anti-Corrosion High-Build Primer

A combined product: corrosion protection + filling of minor imperfections. Reduces the number of processing steps. Popular in body shops for speeding up the workflow.

How to Choose the Right Primer: A Step-by-Step Guide

1. Bare metal after sandblasting → acid etch + acrylic (2 coats)
2. Repair after body filler → acrylic 2K (3–4 coats, wet-on-wet)
3. Heavy corrosion → epoxy + acrylic high-build
4. Planned repaint → acrylic 2K over sound existing paint
5. Plastic parts → specialist plastic primer

Key Specs to Check When Choosing

• Viscosity: for spray gun — 18–22 DIN4; for aerosol — ready to use
• Solid content: the higher the % — the thicker the film build
• Drying time: dust-dry — 10–20 min; fully cured — 1–8 h
• Sandability: important for high-build primers

Automotive Primer Prices in Ukraine (2026)

Acrylic 2K primer: from 800 to 3,000 ₴ per litre depending on brand. Acid etch: 600–1,500 ₴/l. Epoxy: 1,200–4,000 ₴/l. UA-Pro Industry offers genuine products from leading manufacturers with a quality guarantee.