Touch-up surface imperfections before priming and top-coating
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At Eastwood we care about your DIY automotive projects and want you to be 100% satisfied with our products. That’s how we’ve done business since 1978.
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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.
What's Included
One 16-oz. aerosol can of SEM High-Build Primer Gray
Rated 5 out of
5 by
Anonymous from
Excellent PrimerLike a spray gun in a can. Fills great - dries fast. Big can goes a long way.
Date published: 2023-07-12
Rated 5 out of
5 by
Anonymous from
Smooth PrimerI 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
Anonymous from
Top qualitySEM 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
Jeepster from
Got ya' coveredSem 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
Rated 4 out of
5 by
Anonymous from
Would RecommendFills very well and sands easily.
Date published: 2014-06-13
Rated 4 out of
5 by
G V F from
Sem High Build Primer Great ProductThis Primer sprays from the can ,like it was coming from a spray Gun!! Very good flow with minimal runs! Have used it on my antique '41 Buick, and '54 Lincoln! I recommend it to all my friends that have Antique Cars & Trucks! Great Stuff! Need to have Quantity discount! Thanks Eastwood!
I stopped and sanded the parts to a 1958 Lambretta scooter. I then applied Sem Etch primer. Can I scuff that surface, then bondo some rough areas and then paint with High Build before finish painting? If so, what is the best finish paint to use?
Asked by: Steve
Yes, this can certainly be done. As far as a top coat- we have many options that could work. For more information please reach us by calling 800-343-9353 or by emailing [email protected]
Answered by: Kelly H
Date published: 2023-01-05
Will this stick to bare plastic ?
Asked by: Lizkid
Yes, although to be on the safe side and depending on the plastic substrate, I would first spray either SEM plastic adhesion promoter 39863 or SEM xxx adhesion promoter 77723 then apply the high build primer surfacer.
Answered by: Modelcarman81
Date published: 2020-06-07
Can this be used under an acrylic lacquer topcoat?
Asked by: nmi8080
Yes, I actually called SEM and asked them this same specific question.
Answered by: Modelcarman81
Date published: 2020-06-07
should i use an epoxy primer or self etching primer over my high build as a base for paint
Asked by: david
Self-etching Primer should never be applied over anything except bare metal. So the epoxy primer would be the way to go.
Answered by: Bob G
Date published: 2022-06-24
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: 2022-06-24
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
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.
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