application of the self-etching primer or self-etching adhesive. Go deeper into the world of Wonder Spawn with video series only available to premium members. Any slight imperfections and small sanding scratches will be filled with high-build primer in the next step. An etch primer is made to be put on … This helps remove sanding scratches and small surface defects. It leaves a good base for urethane primers and top coats and is ideal for small spot repairs. Place the restorative resin. The final step before applying a coat of paint should involve applying a coat of sealing primer, or sealer. You can generally add as many coats of filler primer as you want, sanding between each coat (as some restorers do) or after every three or four coats. Self-etching ceramic primer versus hydrofluoric acid etching: Etching efficacy and bonding performance J Prosthodont Res. Combines benefits of a weld-thru and traditional self-etch primer . Self etching primer and epoxy primer have different uses when you’re preparing a vehicle for painting. You will hear all kinds of technical facts, personal experiences as well as flat out unsubstantiated opinion. The edges of the layers that were sanded-through tend to heal under a coat of sealer. In order to optimize the technique and reduce bonding time, a new group of primers has been introduced in orthodontics: the self-etching primers (SEP). 22 posts • Page 2 of 3 • 1, 2, 3. edpol. Being knowledgeable will help the final painting of your vehicle as well as the finish and it’s durability. The tell-tale feature will be on the description of the paint container, specifically identifying the self-etching feature included in the paint. It provides excellent adhesion and won’t scrape off without a lot of effort. Self-etching primers have to have another primer over the top of them or the paint won’t adhere. Self-etching primer frequently comes in a gray color, similar to other primer paint. Special Price $13.97 . Add to Wishlist; Eastwood Self Etching Weld thru Primer. Sealers help the paint to stick, and can reduce the chance of having the topcoat paint run. Add to Cart. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. … Sealer is pretty much self-explanatory. What is the difference between self etching primer and regular primer? When applied over properly prepared metal, it has extremely good adhesion qualities. Allow time to dry between coats. I was taught as a paint rep for Sherwin Williams that the etch primer (Vinyl etch to be exact) was the way to go, prior to all undercoats including under epoxy primer. In the meantime, it's important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. Wonder Spawn is a maker lifestyle and entertainment brand founded by TV host, producer and VR creator, Rachel De Barros. There is weak evidence indicating higher odds of failure with self-etch primer than acid etch over 12 … Regular Price: $16.99 . Visit any automotive forum and you can’t help but stumble upon a long running debate on which direct to metal product is better, etch primer or epoxy primer. Both Epoxy Primer and Self-Etch primer (Self-Etching primer) can be used on bare metal. Like everything else, paint continues to evolve with new formulations and chemistry. Required fields are marked *. Make yourself at home...read, ask and answer! Paul edpol's Profile; E-mail edpol; Top Contributor. Self-Etching Primers - Types & Applications - Weld Thru & High Build from Eastwood. Dave. Below is a brief overview of their uses, including good points and bad points, to help decide which type to use for any particular job. In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. If you’re doing some body work and you have some bare metal, you don't want to just put regular primer surfacer because it does not have the corrosion properties like Epoxy or Self-Etch. That was the end all to corrosion protection. Then simply respray the areas you worked on to re-seal them. You also must make sure that the primer you're applying over it plays well with Etch primer. It can’t be an epoxy primer, but it can be a urethane primer. 13, 14. Some restorers believe filler primer is little more than liquid body filler. Answer: A regular primer is made to go on the substrate and provide mechanical adhesion. The acid etches the metal and also puts a slight phosphate coating on it to forestall flash rust from humidity in the air. Just wondering if there is a major difference between etching primer and regular primer!! If extra rust prevention is the goal, use acid etch primer in conjunction with a sealer or rust preventative. Self-etching primer combines the two-step process of etching and primer into one chemical. Answer: A regular primer is made to go on the substrate and provide mechanical adhesion. Thanks in advance Willie Self-etching primer has a chemical additive in it, which etches metal slightly, giving it some real "tooth" for holding the primer tightly. 5 Item(s) Show. There was insufficient evidence to assess the effect of bonding modality on demineralization rates. If your diecast has a lot of fine detail, the self-etching primer will get into the areas that you can’t sand and stick anyway, and it’s thin enough that it won’t hide detail like some primers will. Simply put, epoxy is the best primer for bare metal, making it excellent for newly fabricated metal parts or ones … To simplify orthodontic bonding, self-etching primer (SEP) systems, which combine acid ... the null hypothesis assumed that there were statistically significant differences between (1) SBS values and (2) the site of bond failure of metallic and ceramic brackets bonded to enamel prepared using TPSEP or the conventional-etching method. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. The self-etching ceramic primer produced less surface alterations and comparable bonding efficacy compared to separate hydrofluoric acid/silane primer application. There is a long running debate on which is better, etch primer or epoxy primer. That was the end all to corrosion … I'm curious to know what the difference is between epoxy primer and self etching primer. Do not apply … I'm curious to know what the difference is between epoxy primer and self etching primer. Some are a few hours; others allow several days. Understanding and maintaining wastegate devices on engines, Tracking the price differences on tracked 4WDs. This is done by the primer settling into the scratches created by scuffing or sanding. An automotive paint sealer, is a barrier that seals in everything under it and all above it. I planned on using etching primer. Since it relies on forming a mechanical bond with the metal, you have to manually create the bite it needs by sanding the entire surface of the body with 80 to 180-grit sandpaper. Futures: at least 10 minute delayed. You also can paint over epoxy (not recommended with self etch because the TiO2 (white pigment) will turn a browish tint when applied directly on top of self etch) On the downside, a lot of epoxy primers take a long time to fully cure, some shops claim epoxy does not sand well, thats usually due to the epoxy not being fully cured yet. There was insufficient evidence to assess the effect of bonding modality on demineralization rates. In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. Get both, start with the self etching, and then top coat as many times as needed with the sandable. How it Works. In most cases, the filler primer or high-build primer is also a urethane product. Otherwise, you may find rust popping through the surface down the road. I have used it many times on small areas of bare metal. In this case, a more realistic option may be to use an epoxy primer. Also when working on a metal project how to determine which one is most appropriate for the job at hand. When I worked in a pro paint plant all car/truck bodies were electro dipped, if they got damaged moving them around they would be rubbed down and sorted then given etch primer before the actual primer went on. Once the epoxy primer is down you no longer have to worry about rust while doing your repairs – especially since you can apply body filler right on top of it. The best course of action at this point if you have ANY doubts is to sand it all off and seal it all up with an epoxy primer. If you let your project sit for a week or more, then you’ll have to sand (scuff) the original layer before you pickup where you left off. Acid Etch Primer - Another good, basic auto primer. FREE access to training at http://CollisionBlast.com - Bare metal must have epoxy primer, self etching primer, or DTM Direct to metal primer. That does introduce an extra step for weekend warriors but it’s a small price to pay for being able to work at your own pace and not have to worry about rust. Add to Wishlist; Sort By. Because it cures quickly, it’s the method of choice for collision shops. The use of self-etch primer can still be found in paint manufacturers tech manuals for production (not maximum quality) work, for a couple reasons: Self-etch is easy to use, and is tolerant of poorly prepared metal. The most common paint type comes in a spray can version, which is the easiest to apply. During the recoat window (usually a few days) you can add filler and another coat of epoxy primer without first having to scuff the surface. Between epoxy primer, or sealer were sanded-through tend to heal under a coat of paint was compare. A kinda acid based thinner that allows self curing without light activation description of the self-etching.... Ideal for small spot repairs the form of one or more layers of primer on surface... 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