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USC High Build Primer/Surfacer Gallon is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from my fav primer been shooting this sheit thru a 1.8 for 10years, back when it was made by mortons, now usc. iv shot over a half dozen filler types, bare steel, fiberglass, wood, & even abs plastic with no adhesion promoter & it sticks like glue to everything. not great shelf life as itll separate in can n be like hard playdough in a bucket of grey water. still da sheit tho
Date published: 2018-09-16
Rated 5 out of 5 by from Work saver This is great stuff. Very easy to apply and easily sanded. This covers extremely well and is absolutely High Build. This does go on a bit thick so you have to use the right tip but I love this stuff and you cant beat the price. The mix is simple and fast. I will be using this from now on. This layed down very nicely and reduced sanding.
Date published: 2015-12-21
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Can this product be used over Ospho?

Asked by: Jj207
Unfortunately at this time we have never tested our products over Ospho for compatibility.
Answered by: Scott C
Date published: 2018-10-30

What grit aand paper you recommend to sand this primer down before basecoat?

Asked by: JDCO
It would be recommended to finish sanding this primer down with 400 grit paper.
Answered by: SeanW
Date published: 2018-10-02

How long after applying this does top coat need to be applied

Asked by: DJN 51
Once sanded this primer should be top coated pretty soon after to avoid it absorbing any moisture.
Answered by: Scott C
Date published: 2018-11-21

Do you need a sealer before color paint and if you do what kind of sealer do you use

Asked by: Jackson
A sealer is not necessary. After block sanding this High Build Primer Surfacer, you can top coat directly with your paint. If you want to apply a sealer coat first- you certainly can. We recommend using our Epoxy primer reduced by 20% with Urethane reducer applied as your sealer coat.
Answered by: Kelly H
Date published: 2018-12-08

can laquer base coat be applied over this primer

Asked by: slick2619
Since this is a catalyzed primer you should not have to worry about any reaction with a top coat. Simply apply and let cure and then block sand getting ready for your next product.
Answered by: Scott C
Date published: 2018-09-29

Do you spray it right out of the can or dose it need to be reduced?

Asked by: Robert
These high building primers are designed to simply be activated and sprayed out of a large spray gun such as a 2.0mm nozzle size.
Answered by: Scott C
Date published: 2018-12-08

Can this be used on a plastic bumper?

Asked by: gemini1364
As long as an adhesion promoter is used first there should be no problem using this primer on a plastic bumper to allow you to block sand it nice and straight.
Answered by: Scott C
Date published: 2018-09-29

Does this primer come in black

Asked by: Boots
Unfortunately we do not carry this primer in a black color. The feather fill would be an alternative which is available in black.
Answered by: Scott C
Date published: 2018-07-20
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USC High Build Primer/Surfacer Gallon

USC High Build Primer/Surfacer Gallon

Item #50776ZP Brand: US Chemical

Highly durable primer/surfacer for fiberglass, aluminum, prepped steel
Quantity: close

In stock

Only $52.99


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USC High-Build Primer/Surfacer is as tough and durable as they come Premium high-build polyester formulation is a highly durable primer/surfacer you can use on fiberglass, aluminum and properly prepared steel.
  • Excellent adhesion
  • Very high fill
  • Superior solvent resistance
  • Fast dry to sand
  • Sprayable

More info...
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About USC High Build Primer/Surfacer Gallon

Premium high build formulation is a polyester primer-surfacer which can be used on fiberglass, aluminum and properly prepared steel. Eliminator HB has excellent adhesion, very high fill and superior solvent resistance when properly cured. On fiberglass it replaces damaged gel coat. This tough and durable coating resists stone chipping and abrasion and will fill 36 grit grinder marks in 2 to 3 coats. Cured primer in non-shrinking and compatible all automotive topcoats and meets all VOC regulations. 1 gallon includes 4oz liquid hardener


1-gallon can, with 4-oz. liquid hardener

MSDS Sheet

Click Here for Material Safety Data Sheet

Attention California Residents - Proposition 65

Proposition 65 Warning WARNING - Cancer and Reproductive Harm -

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