High Build Primer for Bathtub, Tile & Cabinet Refinishing
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High Build Primer Resin

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High Build Primer Resin

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Prime & Correct Surface Flaws in One Step

Every refinisher runs into unexpected surface issues - from stubborn color bleed-through to grain patterns and pitted tub bottoms. Instead of reaching for extra products or wasting time on multiple fixes, solve them all in one go with NAPCO’s High Build Primer System.

This 2-part, spray-on solution is built for professional tub and tile refinishers who need fast, flawless results on challenging surfaces. It fills imperfections as you spray, laying down a smooth, even surface that’s ready for your topcoat.

Eliminates common prep problems:

• Darker base colors bleeding through
• Patterning like wood grain that won’t cover
• Pits, pinholes, or surface texture issues

What makes it better:

• Includes High Build Resin + Universal Catalyst
• Convenient 4:1 mix ratio
• No induction time - mix and spray immediately
• Smooths and seals in a single step
• Delivers durable hold and pro-level finish

Whether you’re tackling a worn tub or a patterned tile surround, NAPCO’s High Build Primer helps you correct imperfections and keep your refinishing schedule on track.

Availability:In stock
SKU PRM.HB

Prime & Correct Surface Flaws in One Step

Every refinisher runs into unexpected surface issues - from stubborn color bleed-through to grain patterns and pitted tub bottoms. Instead of reaching for extra products or wasting time on multiple fixes, solve them all in one go with NAPCO’s High Build Primer System.

This 2-part, spray-on solution is built for professional tub and tile refinishers who need fast, flawless results on challenging surfaces. It fills imperfections as you spray, laying down a smooth, even surface that’s ready for your topcoat.

Eliminates common prep problems:

• Darker base colors bleeding through
• Patterning like wood grain that won’t cover
• Pits, pinholes, or surface texture issues

What makes it better:

• Includes High Build Resin + Universal Catalyst
• Convenient 4:1 mix ratio
• No induction time - mix and spray immediately
• Smooths and seals in a single step
• Delivers durable hold and pro-level finish

Whether you’re tackling a worn tub or a patterned tile surround, NAPCO’s High Build Primer helps you correct imperfections and keep your refinishing schedule on track.

There are all sorts of monkey wrenches that can be thrown at you on a job:
  • Original color bleeding through
  • Wood grain or other pattern you can't seem to cover
  • A tub bottom that is covered in pits

Our High-Build Primer will take care of all of these problems. Save time, money and frustration. Prime and fix imperfection at the same time. Our High-Build Primer requires no induction time, conveniently mixes with Poly-Glass Regular Dry Catalyst or Universal Catalyst.

If you aren't refinishing kitchen cabinets you should think about it. Cabinet resurfacing can be highly profitable because customers get a totally new look for pennies on the dollar compared to new cabinets or even refacing. With our High-Build Primer, you can get rid of any wood grain to give you a smooth surface for your topcoat. Game on!

Available in White, Gray or Custom Color.

Application:
Spray 3 light tack coats so that the tub surface is uniformly coated, but one can see through the coating. After the last coat gets to the tack state, the PolyGlass Topcoat can be applied. The High Build dry film thickness target is 0.8 to 1 mil, while the dry film of the PolyGlass topcoat is in the 2.5 to 3.5 mil range.

Surface Preparation:
This High Build Primer requires the bathtub be prepared to accept the primer by etching with NAPCO Extra-Strong ETCH or our NEW Piranha Prep. The primer must be applied to a dry surface with all the loose etch material be removed by like sanding. For cabinetry, sand with 80 grit sandpaper so no waxy lacquer or stain is on the surface prior to spraying the High Build Primer.

WARNING: This product can expose you to Crystalline silica, Titanium dioxide, Toluene, and Ethylbenzene which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

More Information
Weight 1.000000

What is High Build Primer used for in refinishing?

High Build Primer is designed to fill and level surface imperfections before applying a topcoat. It is ideal for tubs, tile, surrounds, and cabinets that have pits, scratches, or uneven surfaces that need to be smoothed out.

When should I use High Build Primer instead of a standard primer?

High Build Primer should be used when the surface has visible imperfections, heavy wear, or deep color that needs to be covered. It provides additional build to help create a uniform, smooth base for the topcoat.

What surfaces can High Build Primer be applied to?

High Build Primer is formulated to bond to properly cleaned and etched bathtubs, showers, surrounds, and tile surfaces, except for fiberglass. It is also effective for kitchen and bathroom cabinet refinishing.

Can High Build Primer help cover old or dark colors?

Yes. High Build Primer is especially useful for transitioning older or darker fixture colors to lighter topcoats, such as converting outdated finishes to a clean, bright white surface.

Does High Build Primer help eliminate wood grain on cabinets?

Yes. When used on cabinets, High Build Primer can help fill and smooth out wood grain, creating a flat, even surface that improves the final appearance of the topcoat.

Why is High Build Primer important for final finish quality?

By filling imperfections and creating a smooth surface, High Build Primer improves adhesion, enhances topcoat appearance, and helps ensure a more durable and professional refinishing result.

 

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