Why do we put epoxy primer before painting with epoxy paint?

Asked By: Alfio Lines | Last Updated: 20th March, 2020
Category: hobbies and interests painting
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There are numerous benefits in applying an epoxy floor primer prior to coating your flooring: Epoxy primers are thin, providing a better adhesion as it penetrated into the concrete substrate allowing a better bond. Primers provide a better chemical bond when using thicker epoxy base coats.

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Beside this, does epoxy paint need primer?

An epoxy primer is the foundation of your floor coating system. Without it, your epoxy system will not work as well no matter what type of epoxy you are applying. Epoxy primers are the layer that you will build upon with other base coats and topcoats.

Also, what is the best primer for epoxy? Seal-Krete Lock-Down Concrete Bonding Primer is a self cross-linking epoxy primer for concrete surfaces which provides superior topcoat adhesion and durability.

In this way, what is the purpose of epoxy primer?

Epoxy primer is a sealer that produces a good surface finish on applied top coats. A two-part epoxy primer contains zinc phosphate, which acts as corrosion-inhibiting pigment. Epoxy primers can be used to waterproof materials that consequently protect the bare metal from oxidation.

How do you apply epoxy primer?

The epoxy primer should be applied in medium wet coats, allowing a half an hour between each coat at around 70 degrees. One to two coats will render a one millimeter dry film thickness, which is typically enough to be completely effective. Make sure to evenly spray each coat completely across the bare metal surface.

34 Related Question Answers Found

Does epoxy need sealer?

In order to prevent the peeling of the top of your new epoxy floor, you will need to seal it. Other reasons for sealing an epoxy floor include preventing color change and reducing slippage. Follow the tips below to seal your epoxy floor to make it safer and help it last longer.

Is Rustoleum primer epoxy?

Rustoleum 2K Epoxy Primer is a true two component, amine cured epoxy aerosol rust inhibitive primer . This primer can be used on clean steel, sound rusted steel, galvanized steel, aluminum, and sound previously coated surfaces. Primer may be wet or dry sanded.

What paint can I use on epoxy resin?

A primer coat prior to painting over epoxy is quite beneficial because it provides a uniform color base and is easier to sand than epoxy resin . It is generally not necessary to use a primer in order for a suitable top coat to adhere to sanded epoxy resin .

Do you need to prime a garage floor before painting?

Probably yes. And probably an oil based primer unless the can says otherwise. On top of that a concrete primer if they exist. If you don't prime then you run the risk of the paint peeling, especially since garage floors are so smooth.

Do I need to seal concrete before epoxy?


Before an epoxy coating is applied to the floor, Jon-Don highly recommends considering the following: New slabs of concrete should be allowed to fully cure for 30-60 days before a coating is applied. If a sealer was previously used on the concrete (if water beads up on the surface), do not use epoxy .

What is Floor primer used for?

Floor Primer helps improve adhesion on dry, dusty and porous substrates. The primer can be used on pour in place gypsum cement underlayment's and to prime soft wood floors including plywood.

Should I prime concrete before painting?

Concrete primer is specifically designed to absorb into the surface of concrete , filling imperfections and creating a smooth surface for the paint . Most primers will dry in a few hours, but home improvement professionals suggest waiting a full eight hours after priming before applying paint just to be sure.

How long can you leave epoxy primer?

epoxy can sit just about forever but if it sets more than a couple days you should sand it and spray a coat of reduced epoxy as a sealer. most epoxies these days have around a 7 day recoat window but the more you wait the worse the adhesion is. i always like to get something on it within 24-48 hours.

Does epoxy primer stop rust?

Epoxy primer actually seals out the oxygen from the metal, leaving no chance of rust or corrosion forming on the surface like some cheap spray bomb type primers . Two-part epoxy primers go one step further by including zinc phosphate, which increases its corrosion-inhibiting properties.

What is the difference between epoxy primer and etch primer?


Epoxy primer is catalyzed and self etching is solvent based. Self etching primer bonds well to bare metal surfaces and can be top coated in a short period of time. Epoxy primer can be applied in heavy coats which can be guide coated and block sanded to remove small imperfections in the body.

Is epoxy primer waterproof?

Epoxy has several distinct advantages over standard primers . Because it's waterproof , its excellent corrosion resistant properties make it the only base primer to use, especially if you reside in a damp climate.

Does primer kill rust?

“You need a primer that will match the surface. “A lot of our primers have rust preventive properties. They will stop any rust from adhering to the surface or will kill the rust . If you have a really rusty surface that you want to paint, even flash rust , we have a product that will remove the rust ,” said Williams.

When can you paint over epoxy primer?

The tech sheets for most Epoxy Primers recommend sanding and recoating with more Epoxy Primer after 7 days. Quote: The tech sheets for most Epoxy Primers recommend sanding and recoating with more Epoxy Primer after 7 days. Scuff it and shoot some 2K over it.

Does epoxy primer need to be sanded?

Epoxy doesn't sand very well as a rule so you might want to use a 2k urethane primer on top of one coat of epoxy after it has flashed. We need more info before we can give you an accurate answer. You can also do filler work over properly prepared bare metal also.

Can you put epoxy primer over filler?


Applying body filler over epoxy primer provides maximum corrosion protection for the metal. Apply filler within seven days of applying epoxy primer to maximize adhesion. OPTIONAL: Scuff Epoxy with P120-P180 grit sand paper or red scuff pad. 2 Mix and apply body filler over epoxy .

Can etch primer be used over paint?

Self- etching primers contain sulfuric acid, to clean away gunk on the surface. For this reason, self- etching primers are not recommended over clear coat finishes or existing paint . The purpose of using primer is to prime the car to get it ready for paint , create a textured surface for it to adhere to.

Will epoxy stick to aluminum?

With proper handling and preparation, epoxy can bond well to most aluminums and aluminum alloys. For more information on compatible metals for epoxy bonding, see EPO-TEK Tech Tip 12. Aluminum presents a particular concern in bonding as it readily oxidizes to form an insulative/passivation layer of aluminum oxide.
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