Does epoxy require primer?

What is epoxy exactly? Epoxy is a resin and hardener mixture that, when combined, makes a permanent bond. The purpose of epoxy paint is to create a chemical resistant, waterproof coating for floors and surfaces.

Epoxies are different from other paints because they require two parts unlike the one can of standard latex or oil-based paint.

What kind of primer do you use before epoxy?

The short answer is a qualified “no.” You don’t typically need to prime before applying epoxy. Epoxy is, essentially, the primer when it comes to protecting surfaces from water damage or wear and tear. This is due partly to its strength; epoxy bonds with the material it’s applied to in such a way that it creates more of an inseparable whole than many other types of paint or coating would.

That being said, there are some situations where you will want to use a primer before applying your epoxy coating. The first is if the surface you are working with has been previously painted or coated. You’ll want to clean off any paint or chemicals and sand down the surface so that your epoxy has something clean and smooth to work with—without this, it won’t bond as strongly as possible with what lies beneath.

In some cases, you might even want to apply an intermediate layer of paint between previous coats and your fresh coat of epoxy—but not always! This depends on how strong the bond between existing layers and the surface itself is in the first place; if these layers are all adhering well to each other, then priming may do more harm than good by disrupting this seal unnecessarily.

Does epoxy shield need primer?

There are lots of reasons why you may want to apply a primer before applying epoxy to your garage floor.

If you’re looking for the best way to finish your concrete or wood surface, take note of the following:

First, it seals in any stains that are on the surface and prevents moisture from penetrating into the cracks. You can use stain-blocking primers such as Kilz or Ben Moore Fresh Start Oil-Based Primer for this purpose.

The stain-blocking property will ensure that any stains won’t soak up into the epoxy; it also helps the paint stick better and lasts longer.

  • It adds strength to the surface and makes it more resistant to acids and harsh chemicals that could damage your floor if they get on it. For example, if you’re using an epoxy shield on a garage floor then applying a primer can help protect against oil spills that may occur in garages!

Can you use primer for epoxy?

As far as painting with epoxy resin goes, it doesn’t matter if you apply a single layer of epoxy or multiple layers. You can paint with primer just like you would paint any other surface.

When applying a base coat, a thin layer of epoxy is spread over the surface and allowed to dry. The more coats that are applied, the stronger the seal becomes and the longer it will take for water to seep in.

It’s important that when using a base coat, the coating is not applied too thickly because this will lead to cracks developing in your final coating after a few months of use.

Do you need to prime epoxy before painting?

You can paint directly onto epoxy, but it’s not recommended unless you have a lot of experience doing so. Many people choose to apply a primer first to ensure the paint will stick and adhere.

Primers are designed to maximize adhesion between the epoxy surface and the top coat of paint by filling in any small cracks or gaps on the surface. If you choose not to use a primer before painting, make sure your epoxy surface is clean and dry before applying the paint.

Why do we put epoxy primer before painting?

Epoxy primer is applied before painting to provide protection for the metal and improve paint adhesion. Epoxy primer is very hard and durable and provides a good base for topcoats.

It is corrosion-resistant, chemical resistant, and protects against acid rain. Epoxy primer can be sanded and has excellent adhesion properties. Once epoxy primer dries it provides a thicker layer than other primers.

The benefits of epoxy primers over regular primers include rust prevention, better adhesion, no need to sand body filler down to bare metal before application (acid etch), improved sanding, ability to spray directly on plastic parts which helps with the bonding between dissimilar substrates.

Can you apply epoxy over paint?

Yes, epoxy can be applied over paint. It is a common application in the garage and basement where concrete has been painted. Epoxy is often used to seal the paint and protect it further. The paint does not need to be removed prior to applying epoxy.

In fact, it shouldn’t be removed because of how hard it would be. However, if there are issues with the concrete below, they will show through after an epoxy coating has been put on top of them. Before coating your floor with epoxy, you should inspect your painted floor for any cracks or holes that could potentially cause problems down the road.

If you find any issues like this ahead of time, you can fix them before installing your new flooring system which will help guarantee that everything stays looking great for years to come.

How do you prepare concrete for epoxy coating?

You can’t just slap down some epoxy and call it a day. A lot of prior work is required to ensure a smooth, professional-looking finish.

The surface must be clean and dry before any work can begin. Dust, dirt, oil, and other contaminants will interfere with the epoxy’s adherence to the concrete surface. Any previous coatings should be removed as well. Use steel wool or sandpaper to scour the floor until it’s perfectly smooth, then vacuum up every last bit of dust and debris that may remain.

Cracks should be filled in using an appropriate patching compound so that they don’t show through once the epoxy has been applied; let this dry completely before continuing with your project. Once everything is set, use acid etching or another method recommended by the manufacturer to scuff up the concrete (this will help provide better bonding). You’re now ready for priming!

Do I need to seal concrete before epoxy?

You’ll want to seal your concrete before applying epoxy so that it is more resistant to moisture. This is especially important if you’re using water-based epoxies. While epoxy is a sealant, it can only be applied over non absorbent material. Concrete is not a non absorbent material.

It’s an absorbent material, and very porous in nature. Epoxy does work as a water barrier and will protect the concrete from further liquid damage however since it’s a non absorbent material you don’t want to apply epoxy directly over an absorbent surface because of the absorption factor. Applying an additional moisture barrier will help eliminate this problem.


Thus, the simple answer to the question “Does epoxy need a primer?” is no. You can have a perfectly good epoxy floor without using a primer. However, if you need to seal existing concrete before coating it with epoxy, then you will have to work in two stages: first prime the concrete and then apply your epoxy coating.

So that’s it! If you’re ready to take your surface from bland and boring to colorful and creative then we’re ready for you! Click below to get started.

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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