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

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


Self Etching Primer JR R&D Corner Hi, this is JR, Product Manager for the Eastwood
Company. We had just some confusion out there on when and when not to use self etching primers.
Well, today we are going to give you the idea you need to make the right decision and right
application, so let’s get started. What exactly is the self etching primer? It is
a lacquer based primer that is formulated with a small amount of acid and what this
acid does is three things, improves adhesion, durability, and color holdout on your top
coat. So, where do I use self etching primer? On
any type of auto-body repair, restoration, and metal fabrication where you have a non-etched
metal surface such as steel, galvanized stainless, aluminum, chrome, and even fiberglass. What
this does is it builds a base to build upon, so you can put any non-epoxy primer or top
coat on top and this ultimately enhances the adhesion, durability, and the color holdout
of your top coat. Now, also get the three types of self etch primer that we offer. We
have original self etch, a new high build, and our weld-thru. Each is available in aerosol
coats and gallons and these are all compatible with any non-epoxy top coat such as our detailed
paints and our European primers. So, let’s start with our original formula. This is great
for general purpose use, auto body restoration, and any type of bare metal work. Our high
build formula is awesome for filling any perfections in the metal. This will save you a lot of
sanding in the long run. And our weld-thru formula is great because it contains no metallic
binder such as copper and zinc. It will provide you long-term protection and ultimately enhance
the durability and color holdout of your project. So, if you have projects in bare metal or
will be in bare metal, Eastwood has the right self etching primer you need to make your
project look great for years to come. Click to buy now button and get some today.

15 thoughts on “Self-Etching Primers – Types & Applications – Weld Thru & High Build from Eastwood

  1. We recommend using a 1.8 or 2.0 tip to spray the Eastwood High Build Self Etching Primer. There are links below the video if you want additional information on these Eastwood products. Thanks for the interest.

  2. Are YOU an Eastwood Guy?  Check out this video from Eastwood to find out:  Big Bottle Opener – Opening a Refreshing Beverage – Are You an Eastwood Guy?

  3. Do you have welding tips for welding with the weld-through primer? I had a terrible time with the zinc-based weld-through I got from NAPA.

  4. With the weld thru primer, doesn't the heat from the weld burn off the primer where the weld is? Would this not leave a unprotected spot? Example when you weld the rocker panels where it will see water in the future. Have you ever welded two pieces of metal together with weld thru primer and then pull the pieces apart to see how much the primer burnt back?

  5. These primers have a home in hard to reach places and for small projects. However, the key here is that it's lacquer based. It will be a poor base to build any quality automotive repair or refinishing of a car. Lacquer is the first paint tech ever and is so antiquated it shouldn't be used in any modern build or restore of an automotive application (with the exception of weld through primers which go between welded substrates where you can't reach after the repair with cavity wax or internal frame coatings). You want to use an epoxy or 2K (two part) urethane primer as a base for quality reasons. Epoxy being the best because most are formulated as a DTM (direct to metal) primer, will truly seal the metal from the elements (unlike every other primer with no exceptions), and are slow cure creating a super hard durable base for your expensive automotive paint and giving you time to paint days (sometimes up to 5-7 days depending on brand, environment, and temp) after priming without sanding. Creating a chemical bond between primer and paint. Don't listen to the hype regarding etch primers for your whole car. Etch with phosphoric acid/metal prep and then wipe down with wax and tar remover to remove the residual acid after the acid has had time to work. Your epoxy should then be able to stick without problems and your metal will be rust free and ready for 2k high build primer or paint!

  6. If I'm using self-etching primer on a bare-metal bike frame and parts, should I sand before applying, then again after final priming coat, then follow it up with a different type primer, then follow that up with sanding before moving on to the color coats?

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