Eastwood Self Etching Weld thru Primer 454grams Aerosol

Combines benefits of a weld-thru and traditional self-etch primer.

Eastwood Self Etching Weld thru Primer - EW12899Z

Eastwood's Self-Etching Weld-Thru Primer combines the benefits of a weld-thru and the capabilities of a traditional self-etching primer.

▶   Enhances adhesion and durability of top coats
▶   Prevents corrosion and reduces spatter
▶   Non-conductive organic binders
▶   Gray color

This unique self-etching primer formula has organic binders that replace conductive heavy metals such as copper and zinc. These organic binders will burn off during the welding process, leaving a corrosion-resistant self-etching primer for paint prep. This product will reduce spatter and distortion caused by excessive heat that occurs during the welding process. Compatible with MIG, TIG and Arc welding. The metal-etching primer will enhance adhesion and durability and is compatible with most top coats.


Clean surface with Eastwood's PRE, prior to applying primer.Apply 2 medium wet coats, allowing 5 minutes flash time between coats.Allow to cure at least 20 minutes prior to welding.


Always consult MSDS for specific safety and hazard warnings. Always wear eye, skin and respiratory protection when painting. Always paint in a well ventilated area away from an open flame.


(Qu) After applying the weld thru primer is it necessary to weld immediately after the primer has dried or does the primer remain effective if I have to wait until the next day to complete welding?
(An) You can wait until the next day if the vehicle is kept indoors.

(Qu) is this product compatible with 316 grade stainless steel?
(An) This could technically be applied to properly scuffed stainless steel. However we would not recommend welding through this since it would give you contamination that you should not have on stainless.

(Qu) Is this compatible with epoxy primer? Can I spray it over the top.
(An) This product is not compatible with Epoxy primer.

(Qu) How long do you have before you have to scuff or recoat with added  primer before topcoating
(An) Allow this to dry roughly 30 minutes before scuffing and applying your topcoat.

msds Click for Material Safety Data Sheet

The information contained herein is based on data considered accurate and reliable to the best of our knowledge and belief as of the date compiled. However no warranty is expressed or implied regarding the accuracy of these data or the results to be obtained from the use hereof.

Watch Self-Etching Primers - Types Video

Self-Etching Primers - Types & Applications - Weld Thru & High Build from Eastwood

Self-Etching Primers - Types & Applications - Weld Thru & High Build from Eastwood

True Acid-Etching Formulation Sticks to Virtually Any Clean Bare Metal
Enhances Adhesion and Durability of Most Non-Epoxy Top Coats
Available in Easy to Use Aerosol Cans

  • Pre weld
    I was waiting on this to precoat my frame and backside of new weld in mounts
  • it works grate
    best primer i used yet go's on smooth drys fast take a look for your self
  • Great for years!
    I have been using this pre-weld primer for years. Have great confidence in it.
  • great product
    I have used other Eastwood products with great success and decided to try this one. This paint is great! I have used the weld-thru primer for the backside of patches prior to welding and was very pleased with the results. I would like to see Eastwood make smaller sized spray cans to get into hard to reach places.
    How many times have I welded a rocker closed or sealed up a pillar wishing I had the maximum possible primer on the inside, so I don't have to do the job again?!? This primer is great! Just spray your parts and keep working, since the factory never even put paint in there, it's gonna be a looong time before someone thinks they have to revisit my work! (Probably never! HA!)
  • 78 Z28 floor pan
    Used this and sprayed old and new metal where they will overlap. Still able to weld through. There is a slight change in your arc similar to when you weld zinc plated parts.
  • WOW
    I do a lot of restoration work on old Jeeps and use this paint exclusivly for protecting my work on the bayer metal even if I dont weld it. I buy it by the case
  • easy to use
    Works 100% better then the copper base one they sold before...this one is high quality and works and doesn't clog up at the nozzle
  • Self etching weld-thru primer
    The product does what it says and more, the zinc chemical also stops the surface rust which is a added bonus. Great buy !
  • Easy
    It is easy to use, sprays on nice, welds through nice no problems when welding
  • Works Great
    Sprays a little thin like good automotive paint. Welds through easy and clean
  • Excellent idea and product
    Covers well and gives me time in case I am unable to weld right away
  • Self-Etching Weld -Thru Primer
    Good stuff better than the other stuff. Bought it on sale.