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SEM High Build Primer Surfacer Gray Aerosol is rated 4.4 out of 5 by 5.
Rated 5 out of 5 by from Smooth Primer I have been using a different high from Eastwood, I have been happy with it but it tended to be chalky but covered very well with a thick build. When I switched to this High Build I was blown away, Using a over lap pattern this primer goes on smooth and thick. I intend to use this as a base before laying down the base coat.
Date published: 2013-08-11
Rated 5 out of 5 by from Top quality SEM primer is the exact primer I was getting from the pro paint shop, which cost more plus the drive to and from. Now it is delivered to my home andcosts less!
Date published: 2013-07-23
Rated 4 out of 5 by from Got ya' covered Sem high build primer fits the bill when you dont' want the hassle of cleaning up your spray equipment. Goes on smooth and covers well. Sanding is a breeze too!
Date published: 2014-12-09
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Can this be used under an acrylic lacquer topcoat?

Asked by: nmi8080
Yes the paint in reference can be applied over this primer.
Answered by: Kelly H
Date published: 2019-10-16

Can you apint directly over this primer and do your Eastwood automotive paint systems bond to this primer? I only need to touch up a spot on my car before painting it, the car is fiberglass.

Asked by: Kyle123
If you are just doing a small touch up area painting over it will be no problem. Applying an Epoxy Primer will help with the adhesion.
Answered by: Bob G
Date published: 2019-04-27

Had frame blasted can you give me a list of products to coat the bare metal with I want a costing that's gonna last and look good

Asked by: Flood5662
Please call us at: 800-343-9353 or by emailing: techelp@eastwood.com
Answered by: Kelly H
Date published: 2019-04-24

Can this be used for a plastic shower base?  Do you carry a product that would be better suited for the job?  Finally, what would be the best top coat for the primer you suggest?  Thank you. 

Asked by: Capn
Unfortunately we only test for automotive use only. We have no way of knowing how it would hold up for an application of this sort. We apologize for the inconvenience.
Answered by: Kelly H
Date published: 2019-04-08

can this be used on an engine? i dont see a temp rating

Asked by: fiftyfordmario
This is not rated for high temps and will not withstand the heat of an engine.
Answered by: SeanW
Date published: 2019-01-27

Sanded to bare metal an entire '00 Volvo S40. I then used the SEM 42003 Black High-Build Primer over the bare-metal car. Has this been a mistake? Do I need to sand off $150 and re-shoot with 2k Primer? What issues could I experience if I leave it HB?

Asked by: JustAnOldCoot
While there technically wouldn't be an issue having high build on the vehicle the problem is on an over all paint job you would want to use with Epoxy primer or self etch as your base primer for ultimate strength.
Answered by: Scott C
Date published: 2018-07-24

How many cans would it take to cover a 1978 El Camino

Asked by: ISAIAH
Since each can covers approximately 15 SQ FT it would probably take 10-15 cans to cover the exterior of a vehicle. Since this is a non-catalyzed product it would not necessarily be the best option for durability. Our 2K urethane primer surfacer would be an automotive grade primer in a spray can. https://www.eastwood.com/2k-aerospraytm-high-build-urethane-primer-gray-black.html
Answered by: Scott C
Date published: 2018-07-05

Can this be used over Eastwood Rust Encapsulator and then top coated with Eastwood Underhood Black? I am looking to cover pitting on Radiator Support, Headlight Buckets and the like. Thank you.

Asked by: 73 Blue RT
You can certainly apply this product over our Rust Encasulator to allow you to block sand the area smooth in preparation for our underhood black.
Answered by: Scott C
Date published: 2018-06-01
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SEM High Build Primer Surfacer Gray Aerosol

SEM High Build Primer Surfacer Gray Aerosol

Item #50056Z Brand: SEM

Touch-up surface imperfections before priming and top-coating
Quantity: close

In stock

Only $17.99


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SEM High-Build Primer Surfacer provides superior adhesion with fast film build and flexibility

  • Provides superior adhesion
  • Excellent filling properties
  • Works on flexible or rigid substrates
  • Easy to sand
  • Topcoat with most refinish material

High-Build Primer Surfacer is a flexible acrylic coating for priming steel, aluminum, urethane, fiberglass and plastics.

If you've ever block sanded down to bare metal, here's an easy way to touch up. The SEM High Build Primer Surfacer provides superior adhesion with fast film build and flexibility when priming steel, aluminum, urethane, plastic and other similar surfaces. Sands easily with 320 - 400 grit. One 16 oz net wt. aerosol can covers about 15 square feet.

More info...
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One 16-oz. aerosol can of SEM High-Build Primer Gray


Click here for Technical Data Sheet

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Eastwood Offers Free Lifetime Technical Support

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Attention California Residents - Proposition 65

Proposition 65 Warning WARNING - Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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