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Item # 50056Z BRAND: SEM

SEM High Build Primer Surfacer Gray Aerosol

Touch-up surface imperfections before priming and top-coating
Touch-up surface imperfections before priming and top-coating
SEM High Build Primer Surfacer Gray Aerosol is rated 4.5 out of 5 by 6.
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Touch-up surface imperfections before priming and top-coating

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SEM High Build Primer Surfacer Gray Aerosol
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Product Overview:

Description

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.

In the Box

Contents

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

Guides & Accessories

Reviews

Rated 5 out of 5 by from Excellent Primer Like 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 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
Rated 4 out of 5 by from Would Recommend Fills very well and sands easily.
Date published: 2014-06-13
Rated 4 out of 5 by from Sem High Build Primer Great Product This 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!
Date published: 2011-01-15
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Questions & Answers

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 tech@eastwood.com
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

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
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