Restoration Shop 2K High-Build Urethane Primer Kit - 1.25 Qt (Gray) 4:1 Mix, Fast Sanding

Restoration Shop’s 1.25 Quart 2K High-Build Urethane Primer Kit is a two-component gray primer surfacer and hardener system formulated to fill medium-to-deep sanding marks and provide a direct-to-metal base for urethane topcoats.

This kit combines a 1 quart gray urethane primer surfacer with a 1/2 pint urethane hardener in a 4:1 mix ratio to yield 1.25 quarts of sprayable 2K primer. Designed for professional auto body repair and refinishing, the high-solids, high-build formula offers strong filling properties, fast dry times, and easy sanding without loading abrasive paper. It is optimized for adhesion to properly prepared bare metal, previously painted surfaces, body filler, and many automotive plastics, and it accepts primer tints or basecoat toners for color matching or faster coverage.

How does this primer help when repairing medium to deep sanding scratches?

The high-solids, high-build surfacer lays down a thicker film than conventional primers, which bridges and fills sand scratches and low spots so you can restore a smooth substrate before topcoating. Because it sands evenly wet or dry and resists paper loading, feathering and final contouring are faster and more predictable.

• High-build formula fills medium-to-deep scratches and gouges
• Sands cleanly wet or dry without clogging sandpaper
• Creates a smooth, uniform surface for basecoats

Can I apply this primer directly to bare metal and plastics?

Yes — when surfaces are properly cleaned and prepped, the DTM4200 direct-to-metal formulation adheres strongly to bare steel and aluminum as well as to properly prepared painted panels, body filler, and many automotive plastics. Proper surface preparation and adherence to recommended application steps are essential for consistent results.

• Formulated for direct-to-metal adhesion on prepared substrates
• Compatible with previously painted panels and body fillers
• Works with many automotive plastics after correct prep

What is the mixing ratio, pot life, and topcoat compatibility?

The kit mixes at a 4:1 ratio (1 qt primer to 1/2 pt hardener) producing 1.25 quarts of ready-to-spray 2K primer. Pot life and dry times depend on temperature and reducer choice; follow manufacturer instructions for thinning and flash times. This urethane surfacer is designed to accept urethane finishes, and it provides excellent color holdout under modern urethane basecoats and clears.

• Mix ratio: 4 parts primer to 1 part hardener (4:1)
• Yields 1.25 quarts of sprayable 2K primer
• Compatible with urethane basecoats and clearcoats

How does it perform during sanding and tinting?

The high-solids surfacer sands uniformly without loading, making feather, block, and guide-sanding steps faster and cleaner. It can be tinted with primer tints or basecoat toner to fine-tune contrast under topcoats and improve coverage for darker finishes.

• Sands easily wet or dry for efficient finishing
• Accepts primer tints and basecoat toners for color balancing
• Reduces sanding cycles by filling low spots effectively

Who is this for: This Restoration Shop 1.25 Quart 2K High-Build Urethane Primer Kit is aimed at professional auto body shops, experienced refinishers, and serious DIYers who need a high-performance surfacer for repair work and repainting. It’s well suited to projects requiring strong filling capability, reliable direct-to-metal adhesion, and a primer that integrates cleanly with urethane topcoats. For best results, follow surface-prep, mixing, and application instructions and use appropriate personal protective equipment and spraying conditions.