Can you put epoxy over polyurethane?

Asked By: Margalida Guerenabarrena | Last Updated: 18th April, 2020
Category: hobbies and interests woodworking
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We do not recommend putting the epoxy over water-based polyurethane. The epoxy could cause the water-based polyurethane to wrinkle or soften. Also, Epoxy does not stick very well to water based polyurethanes and you could end up with fisheyes (epoxy pushing away from the surface).

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Accordingly, can I put two part epoxy over polyurethane?

If your surface has an oil based stain or oil based paint, you must apply 2-3 coats of oil based polyurethane before doing the seal coat. The polyurethane will cover that and allow the epoxy to stick. This does not take the place of the epoxy seal coat as that is still necessary.

Also, can you pour on polyurethane? To seal the wood before top coating, thin your oil-based polyurethane to one part mineral spirits and two parts polyurethane (first, gently stir the contents in the can). Pour the products into a glass jar and gently stir the mixture with a flat stir stick. NOTE: Never shake a can of polyurethane!

One may also ask, does epoxy bond to polyurethane?

Epoxy and Polyurethane compounds are thermoset plastics. Epoxy and Polyurethane substrates bond well to each other as long as the surfaces are clean and slightly abraded.

Can you use glaze coat over polyurethane?

You can turn any clear finish into a glaze by adding pigment, or you can buy a pre-mixed glaze. Oil-based polyurethane and epoxy resin glazes work best on cured polyurethane. Apply with care.

39 Related Question Answers Found

What does epoxy not stick to?

Epoxy resin adhesives will bond all woods, aluminum and glass well. It does not bond to Teflon, polyethylene, polypropylene, nylon, or Mylar. It bonds poorly to polyvinyl chloride, acrylic and polycarbonate plastics. The only way to tell if an epoxy will bond to a material is to try it.

Can you Mod Podge over epoxy?

Add 1-2 additional coats of mod podge on top of the material to seal it and allow it to dry. You can then proceed with following the instructions to pour the epoxy directly over the fabric. You'll want to lay the plexiglass( or acrylic sheet) over the fabric and "glue" it down with an ultra clear acrylic glue.

Will epoxy resin stick to varnish?

As a general rule, epoxy should not be applied over other coatings. An exception is water-based stain (assuming it has been left to dry thoroughly) but anything containing solvents might cause damage to the epoxy layer, or the epoxy might soften the varnish/stain.

How thick can you pour epoxy resin?

Water-clear, high-gloss, low-viscosity, pourable epoxy resin lets you pour single layers up to 1″ thick for larger applications, and up to 2″ thick for smaller molds.

Can you epoxy over linseed oil?


No, don't oil under the epoxy. Epoxy will not bond to the oil.

Should I stain before epoxy?

You can stain over epoxy if you're using a gel stain, which works like paint more than stain. Epoxy, like any plastic, won't absorb coloring and most likely the stain will rub off of the spot while you apply the finish (assuming you're using a wipe-on).

What is the difference between epoxy resin and polyurethane?

The main operational differences between epoxy and polyurethane are:1. Epoxy floors are usually harder than polyurethanes, For Epoxy they have higher compressive and impact strength2. Polyurethane floors are usually softer and elastic. This gives them a better resistance and scratching.

Will epoxy stick to water based polyurethane?

We do not recommend putting the epoxy over water-based polyurethane. The epoxy could cause the water-based polyurethane to wrinkle or soften. Also, Epoxy does not stick very well to water based polyurethanes and you could end up with fisheyes (epoxy pushing away from the surface).

Can you apply epoxy with a brush?

Yes, epoxy resin can be used as a glue. In fact, it may be the strongest glue you will ever use! Mix and stir as usual, and apply as necessary with a brush or foam brush.

Do you have to sand between coats of epoxy resin?


Then you'll begin sanding epoxy resin between coats. Sanding epoxy isn't hard, but you'll want to be thorough! Sand the entire piece evenly. It will look terrible when you finish sanding it, but don't worry.

Can you pour epoxy over cured epoxy?

Can I put another coat of epoxy over cured epoxy? Yes. Since the epoxy has cured a chemical bond is not possible so what is called a mechanical bond is needed. This simply means that the cured epoxy has to be lightly sanded before the next coat is applied: the first coat should have a matt, almost white, surface.

How do you shine epoxy after sanding?

When you're done sanding your resin, dry it off with a towel to remove any grit or dust and apply a polishing compound across its surface. Use a microfiber cloth to rub the compound into small pieces, or a buffing wheel or polishing tool for larger items.

How do you apply a second coat of epoxy?

If you are looking for that layered look, there are two ways to achieve it: 1) First, you can wait 24 hrs after your first pour, sand down the whole piece with coarse sandpaper to create some tooth, and pour your second coat at that point, as originally described. Repeat until you reach the thickness you desire.

What happens if you don't sand between coats of polyurethane?

Q: What will happen to a wood floor if you do not sand between coats of polyurethane? A: Nothing, provided you apply each coat of finish within a reasonable amount of time. If you get dust nibs or brush marks in the finish, sanding will smooth them, and your next coat will look better if you work on a smooth surface.

Can you apply a second coat of polyurethane without sanding?


There is no substitute for sanding between each coat if you want the best finish. I get the best result building or refinishing furniture when I thin oil based urethane 3 parts urethane- 1 part mineral spirits for the first coat. Sand with 220 grit after first coat and wipe down with a tack cloth.

How do you apply polyurethane without brush marks?

A light coating of finish after sanding disguises the area.
  1. Sand down the brush marks lightly with the fine-grit sandpaper.
  2. Brush the sanded area off with a soft cloth to remove all traces of dirt and grit from the sanding.
  3. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra.

Do you sand the last coat of polyurethane?

No, you don't sand the final coat. You make sure you either spray it, or lay it on nice and even. Sand the previous coats to make sure there is a perfectly flat and even base for the final coat.