Top 10 Best weld thru primer in 2026

Last Updated - 6/17/2026

🏆Best Choice

Rust-Oleum

Rust-Oleum 249322 Automotive Self Etching Primer Spray, 12 oz, Matte Dark Green

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Self etching primer is suitable for use on bare metal, aluminum and fiberglass surfaces
•Oil based paint with Stops Rust formula provides rust resistant base coat for cars, trucks and other vehicles
•Covers up to 12 sq ft, dries to the touch in 10 minutes and can be topcoated in 30 minutes
•High quality spray paint ensures long lasting, durable coating while 2 in 1 formula saves time
•Provides maximum adhesion while flat finish promotes smoothness of the top coat
•For use on bare metal, aluminum and fiberglass surfaces
•Stops Rust Formula prevents corrosion and rust
•Any-angle spray technology allows the can to be sprayed in any direction, even upside down
•Etches and primes in 1 easy step
•This item is not for sale in Catalina Island
•For use on bare metal, aluminum and fiberglass surfaces
•Stops Rust Formula prevents corrosion and rust
•Any-angle spray technology allows the can to be sprayed in any direction, even upside down
•Etches and primes in 1 easy step
•This item is not for sale in Catalina Island

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$7.47

$10.29

-27%

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Seymour Paint

Seymour 20-1675 PBE Professional Primer, Self Etching/Weld Through Gray

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•A durable, zinc enhanced coating that protects all metal surfaces
•Electrochemical galvanic action keeps on protecting even if scratched
•Dry film is 86-Percent pigment which results in less smoke and electrode wear when welding
•Cuts faster than 100-Percent zinc rich coatings
•Heat resistant up to 250˚F

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$14.99

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Seymour Paint

Seymour 20-1674 PBE Professional Primer, Gray Filler

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Specifically formulated to meet the performance needs of body shop personnel
•Minimizes the appearance of deep surface scratches on metal surfaces
•Dries fast to form a thick, sandable base coat in no time
•Large sprayhead gives a professional looking application
•Heat resistant up to 250˚F and VOC Compliant

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$13.07

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Steel-It

Steel-It 1002D Polyurethane Aerosol, Industrial Paint Coatings, Weldable, Easy to Apply - Steel Gray (1 Pack)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Industrial Paint Coatings Engineered with Stainless Steel for Superior Protection
•Protects Against the Destruction and High-Cost of Corrosion
•Use on Food Processing Equipment Where USDA Approval for Incidental Food Contact is Required
•Incredible Aesthetic Appeal and Durable Finish
•1 Can of Steel Gray Polyurethane Aerosol

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$29.99

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Seymour

Seymour 16-845 Primer, Spray Weld Through

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•High quality, fast drying surface
•Excellent adhesion for a finishing coat
•Product is flexible and sandable
•Works on metal and wood
•Does not contain lead, cadmium, mercury, chromates or chlorinated solvents

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$12.99

$15.88

-18%

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Spray max

Spray Max 1K Self Etch Weld Thru Primer

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Corrosion protection primer with very good adhesion properties
•Suitable for bare, sanded and unsanded surfaces
•Cannot be retouched with polyester materials
•Welding test certificate: repels welding beads
•Can also be used on old paint coatings as a sealer

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$64.55

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SEM

Sem 40773 zinc Based Weld Thru Primer

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Weld thru primer
•Zinc-based formula for best-in-class corrosion protection
•Enhanced adhesion to bare metal for added corrosion protection
•OEM recommended

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$33.54

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Weld-Aid

Weld-Aid B-100 Brite Zinc Primer, 12.5 oz

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•69 percent zinc metal
•Special no clog nozzle
•Covers 40 square feet
•Meets ASTM-A780 for corrosion protection
•12.5 oz aerosol can

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$14.79

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U-POL

U-POL UPol WELD/AL WELD-2 353 g/12 Oz Zinc Rich Primer - Grey/green

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•High adhesion, super conductive primer.
•Offers the best rust protection for SPOT, MIG & TIG welding applications.
•Super high concentration of zinc or copper in the dry film.

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$35.44

$39.99

-11%

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3M Weld-Thru Coating II, 05917, Zinc Based Aerosol Coating, Resists Weld Spatter, 12.75 oz Net Wt/361 g

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•PREVENTS COSTLY COMEBACKS: Protects bare metal panels and parts from corrosion after welding
•ZINC BASE: Draws away contact corrosion, leaving substrates strong
•CONVENIENT AEROSOL SPRAY: Applies fast to increasing shop efficiency and productivity
•QUICK DRYING: Dries in as little as 5 minutes before MIG welding for efficient throughput
•MINIMUM WELD SPATTER: Special formulation helps prevent shop damage
•For industrial/occupational use only. Not for consumer sale or use.

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$48.15

$50.55

-5%

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