What Is High Fill Primer?

Do you rub down primer before paint?

Primer is pourus, as long as you let it harden properly and thoroughly dry it afterwards it should be fine, I always wet flat between stages when I’m using rattle cans.

Btw I’d go with at least 800-1000 before top coat personally mate.

That way you’ll get a really smooth surface ready for basecoat..

What happens if you dont sand primer?

For your finish to be vibrant and not dull sanding after primer will ensure that the finish is not excessively dulled when you apply your paint top coat. You will typically use finer grit sandpaper and aim to achieve a smooth wood finish so that you get a fine appearing wood finish when you apply your topcoat.

Does high build primer need sanding?

Sand it all with 220 to provide adequate tooth for the high build. If your only concern with the previous steps was scratches and it is otherwise flat and level you can then block with 400 then 600. A sealer after this is really only beneficial if the finish color and your highbuild color are not complementing.

Should I sand primer before basecoat?

While on the other hand, with base coat and clear coat, you will have to sand a little bit more. I hear of some people sanding down to 600, 800, or 1000, some even sand paint over 1500. … That’s what the paint adheres to. That’s why when you do anything, you have to sand it before you glue it together.

How much will high build primer hide?

Yes it will “hide” 180 scratches, but if you think you’re tired of sanding, you have about twice as much left to go before you are done.

What’s the difference between 1k and 2k primer?

The “k” in primer stands for component, but in Europe it is spelled with a “k” (ie Komponent) So a 1k primer means only one component so just the primer is needed to spray on a panel. 2k primer means 2 different components so the primer and a activator is needed before spraying on a panel.

What grit do I use to block sand after primer?

Never block your vehicle without a sanding block of some kind. Sandpaper for blocking can be purchased in a variety of grits. Mark Oja recommends 220-grit sandpaper for the initial cutting of the primer. For the final surface prep, 400-grit paper is used.

How long should I leave primer before sanding?

24 hrs is pretty safe. I used 400 grit wet/dry sandpaper and wet sanded the primer until smooth. No runs or orange peel ( rough texture) if you sand through the primer just dry off the frame and re prime that spot.

What is the best filler primer?

While polyester primers are great for filling, they can be porous. Once you’re finished sanding the polyester primer, use a urethane primer or a sealer over it. Urethane primers are a better surface for basecoats. The urethane primer is much denser and seals the polyester surface.

Does primer need to be perfect?

The primer coat doesn’t have to be perfect, but it should cover the surface (no bare spots) and it shouldn’t be so blotchy that you get drips or visible unevenness. You need to prime the surface thoroughly. The purpose of the primer is so give the surface uniform absorbtion properties.

Is primer and sealer the same thing?

Explanation: Sealer :A coating used on absorbent surfaces prior to painting. Primer :The first coat of paint applied to a surface, formulated to have good bonding, wetting and inhibiting properties. … PRIME COAT OR PRIMER: The first coat or undercoat that helps bind the topcoat to the substrate.

What is high build primer used for?

High build primer surfacer is basically scratch filler. Thick paint, usually polyester based. Typically used on fiberglass parts or over “Bondo” as the final layer before primer-sealer and top coats. Not the same as your self-etching primer.

Does 2k primer need to be sanded?

2K urethane’s need to be sanded with the exception of when thinned down to use as a sealer and then you have a limited re-coat time, usually 15-45 minutes.

Will high build primer fill scratches?

Also High build Primer DOES fill sand scratches, very well actually. Etch Primer and epoxy are not for filling scratches generally. High build Primer can fill 180 sand scratches.

Do you have to sand high build primer?

Then get an epoxy sealer to spray over it. If you do it properly there should be no need to sand the sealer unless you bypass the recoat window then it will need to be scuffed. If you can’t spray your sealer without having to sand it you are going to have a hell of a time with your top coat.

What is the difference between self etching primer and primer?

A primer that is self-etching is normally considered a high-build coating (HBC). HBCs are formulated to only require one coat to complete the job (source). Self-etching primer is thick and typically only needs one coat before you can move on to the topcoat.

Is it better to wet sand or dry sand primer?

I find wet to work better no mater what the primer, even a 2k. Wet sanding allows the little soap and constant wash to keep the paper clean… Which the dry sand sucks at, it will constantly clog compared to the wet.

How many coats of filler primer do I need?

there’s no such thing as “a coat of primer”. you need at least 2 coats and sometimes 3 for the primer to actually do what it’s supposed to do, fill sanding scratches from either bondo or a previous wet sanding.

Can you spray 2k over 1k primer?

Strictly speaking 2k top coats will go over 1k primer. You could argue that way there is less chance of a reaction. Remember epoxy primers main purpose is a very durable corrosion resistant layer. If you don’t want any hassle from the paint shop just leave it at the epoxy stage flattened off.

Does high build primer work?

High build primes gives you an even surface for the paint to absorb evenly. You can use it, but it won’t benefit you other than priming the substrate, depending on which hb primer you use. Some require a additional primer. SW high build is good and does not.

Is high build primer the same as filler primer?

Filler primers In most cases, the filler primer or high-build primer is also a urethane product. … Because it has the texture to fill pits and imperfections in the sheet metal, an unsanded primer coat would be too rough to paint over without further preparation, which includes a sealing primer.