Table Top Epoxy: How to Get a Flawless, Glass-Clear Finish

A table top epoxy pour looks like magic in a time-lapse. You mix two clear liquids, pour them onto a wooden table, and twenty minutes later the surface is flat, deep and glass-clear. What the time-lapse leaves out is that almost every bad result comes from three or four small decisions made before the epoxy ever hits the wood.

This guide walks through the whole process the way McKinnon's own instruction sheet lays it out: what the product is, how to prepare the surface, how to measure and mix it, how to pour a seal coat and a flood coat, how to get the bubbles out, and what to do when something goes sideways. The specifics here come from the EZ Coat instruction sheet, which you can download and keep beside you while you work.

What table top epoxy actually is

Table top epoxy is a two-part clear coating. McKinnon's EZ Coat is a 100% solids, high-build clear polymer that ships as a bottle of resin and a bottle of hardener, mixed together at a 1 to 1 ratio by volume. It cures to a clear, glass-like finish that resists scratching and will not distort with age. The instruction sheet describes it as a basic decoupage epoxy used for bar and table tops, clocks and photo laminations — wherever a glass-like thick finish is wanted.

Two things are worth knowing up front, because they shape what you can reasonably ask of it.

It builds depth in layers, not in one pour. Each flood coat self-levels at roughly 1/8 inch, and no single pour should ever exceed 3/16 inch. You can build up considerable depth, but you do it with repeated pours and waiting time between them, not by filling a deep void in one shot. If your project is a casting job — a river table, an object suspended in a thick slab of resin — that is a different kind of product, and this is not it.

It is water resistant and resists yellowing, but it does not provide 100% UV protection. McKinnon's instruction sheet says so plainly, and adds that this should be carefully considered before applying in an outdoor, high-UV setting. A sunroom table is a different proposition from a patio table that bakes all afternoon. Think that through before you start rather than after.

The two-coat system that first-timers skip

This is the single most useful thing to understand before you buy anything. A table top epoxy finish is built in two distinct stages, and they do different jobs.

The seal coat goes on first. It is brushed on thin and its only purpose is to seal the porosity of the surface. Wood is full of tiny air pockets, and if you skip this step those pockets push air up into your finish coat for hours. The seal coat closes them off. You want no build-up at all here — just enough to cover the grain.

The flood coat comes after the seal coat has set for at least four hours. This is the one that gives you the finish. It is poured on, allowed to flow out and self-level, and gently guided with a rubber squeegee or a foam brush. Most bar and table projects take one to three flood coats.

People who skip the seal coat and go straight to a flood coat almost always end up with bubbles they cannot remove. The order matters more than the technique.

Before you open the kits: temperature, room and level

Three conditions decide whether this goes well, and all three are free to get right.

Temperature. The ideal working temperature is 75 to 80°F, and the product itself needs to have acclimated to at least 75°F before you mix it. This is not a gentle suggestion. The instruction sheet carries an explicit cold weather warning: below 75°F, mixing becomes extremely difficult and you get excess air bubbles that cannot be removed. If the kits have been sitting in a cold garage, bring them inside a day early.

The room. Work somewhere clean, dry, and as dust- and insect-free as you can manage. Settling dust lands in the wet epoxy and cures into it. A garage with the door open on a breezy day is working against you.

Level. Check that your project surface is actually level before you pour. Epoxy is a liquid and it will find the low point and puddle there. A table that is a few degrees off will cure thick at one end and thin at the other, and there is no fixing that afterward.

Preparing the surface — and the stain rule that trips people up

For most projects, the wood should be sanded first, then cleaned and left completely dust-free. Any prior stain or finish has to be completely dry before you begin. Moisture, oils, grease or an uncured finish underneath can cause fish-eye — crater-like openings in the surface — or stop the epoxy curing properly.

If you are staining the wood, the type of stain changes your timeline dramatically, and this is where a lot of otherwise careful projects come apart:

• Alcohol-based NGR stain is what McKinnon recommends. Allow 24 hours for it to dry fully before applying epoxy.
• Oil-based stain is a much longer road. It dries slowly, and coating over it too early causes fish-eye or makes the epoxy lose adhesion and lift. The instruction sheet is specific: let oil-based stain dry for at least one week, or until it is genuinely fully dry, then seal it with a clear oil-based polyurethane. Only after that polyurethane has cured for 48 hours can the epoxy go on top.

That oil-based sequence is a week and a half of waiting, not a weekend. It is worth knowing before you pick a stain rather than after.

How much epoxy do you need?

Work out your square footage — length times width — and then plan the two coats separately, because they have very different coverage rates.

• Seal coat: about 48 square feet per gallon. It goes on thin.
• Flood coat: about 16 square feet per gallon. Roughly three times the material of the seal coat, per coat.

Take a 3 foot by 6 foot table as an example. That is 18 square feet. The seal coat needs about 48 ounces of mixed material. Each flood coat needs about 144 ounces, so two flood coats is 288 ounces. Add it up and you are at roughly 2.6 gallons of mixed epoxy for the whole job. EZ Coat kits run from 1 gallon up to 20 gallon, so you would plan around that total rather than buying a single gallon and hoping.

One practical note on large projects: you do not have to mix the entire amount at once, and for anything over two gallons you should not try. Mixing multiple batches for a single coat is fine as long as they are poured right after each other. Big pours generally want two people — one mixing, one pouring — so everything lands inside the working time.

Measuring and mixing: the step that decides everything

If a table top epoxy project fails, this is almost always where it failed. It is worth slowing down here.

Measure accurately. One part resin to one part hardener, by volume, in clean graduated measuring cups. Do not eyeball it and do not simply empty both containers and assume they match. Epoxies are formulated to cure at a specific proportion, and a variance from 1:1 can leave the surface that never fully cures. Pour the hardener into the container first, then the resin — it helps the two blend more thoroughly.

Use a container about 30% bigger than the amount you are mixing, so you can stir hard without slopping over the lip.

Mix by hand, and mix longer than feels necessary. Use a clean stir stick. As you start, the mixture turns cloudy white — that is the two components beginning to blend. Keep going until every trace of cloudiness and every hazy streak is gone and the mix is completely transparent, so you can see clean through to the bottom of the container. Timing it with a watch is a good idea:

• 2 quarts (a good beginner batch size): about 4 to 5 minutes
• 1 gallon: about 5 to 7 minutes
• 2 gallons: about 6 to 8 minutes, and only experienced users should attempt this much in one batch

A bright light set next to the container makes it much easier to see whether those hazy lines are really gone.

Do not whip it. Lifting the stick out as you stir beats air into the mix, and that produces a huge number of tiny bubbles which are very difficult to get back out. Keep the stick down and moving.

Scrape the sides and the stick while you are mixing. Unmixed material clinging to the wall of the container is the classic cause of a soft, sticky patch later.

And then the rule that sounds like a contradiction of the one above, and is not:

When you pour, never scrape out the container. Dump the mixed epoxy onto the surface and set the container down. Do not chase the last drops with a stick or a brush. No matter how thoroughly you mixed, there is always some unmixed material stuck to the container, and dislodging it onto your table is how you get a wet or sticky spot in an otherwise perfect finish. Scrape while mixing; never scrape while pouring.

Finally, do not leave mixed epoxy sitting in the bucket. The longer it sits, the more heat it generates, and a forgotten batch can start to smoke and cure solid in the container. Mix it, pour it.

Pouring the seal coat

Start at one end and pour the resin along the length of the surface. Set the container down, then use a rubber squeegee or a foam brush to drag it across the whole surface into an even film. Remember what this coat is for: it is covering the grain, not building thickness. Usually one seal coat does it, though very porous wood or open knots sometimes need more than one to seal completely.

Dense wood needs the opposite care. If the seal coat is going on too heavy, either mix less for it or squeegee the excess off after you pour. A seal coat that goes on too thick can end up trapping air bubbles in the cured epoxy — the very thing it exists to prevent.

Wait a minimum of four hours before moving on to a flood coat.

Pouring the flood coat

The pour pattern depends on the shape of what you are coating:

• For tables: pour into the middle and let the epoxy flow outward on its own.
• For bars: start at one end and pour along the entire length.

You are pouring roughly three times the material you used on the seal coat, so it starts flowing immediately. Use a squeegee or foam brush to guide it into the corners, but use it as little as you can — dragging hard with a brush drives hundreds of bubbles into the surface, and those are effectively impossible to remove.

On a bar or a table with an exposed edge, the general recommendation is to let the flood coat run over the sides, which coats the vertical edges as it goes. Those edges will never build as thick as the flat top, so work them with a brush to keep the coverage even. Drips will form underneath the edge; once the epoxy has cured you can sand them off, or if you catch it at the right moment during curing, cut them cleanly with a razor knife.

If your design calls for a dam at the edge instead, build it carefully so it can actually be removed after curing. A smooth, soft or flexible plastic strip works well because epoxy will not stick to it. Wooden trim can work, but only if it is first covered with 2 to 4 mil plastic sheeting, tacked so nothing seeps between the edge and the plastic. Test any damming method on a small mock-up first.

Getting the bubbles out

Once the surface is covered, you move straight to popping air bubbles. The best tool is a small propane torch. Hold the heat source about 6 to 10 inches from the surface and sweep across quickly — you will see the bubbles pop as it passes. A heat gun or hair dryer also works, with one trade-off: both move a lot of air around, which raises the risk of dust settling into the wet coating.

Whatever you use, keep it moving. Holding heat in one place leaves a ripple in the cured surface.

Then stay with the project. Plan to stand by for at least 30 minutes after pouring, because bubbles keep rising and appearing during that window, and they are trivial to pop while the epoxy is still wet.

Recoating

How you recoat depends entirely on timing:

• Within a 4 to 10 hour window: no surface preparation is needed at all. The layers chemically bond together as one.
• After the previous layer has fully dried: sand lightly with 180 or 220 grit, then wipe the surface down with a solvent such as denatured alcohol or acetone. Do not use paint thinner or mineral spirits. Use a clean, lint-free rag and keep going until every trace of sanding dust is gone.

Do not worry about the sanding scratches showing. The next pour fills them in and the surface goes back to looking like glass.

Curing, and the first two weeks

After the final coat, keep the area as clean and dust-free as possible while it cures. At 80°F the epoxy takes roughly 12 to 14 hours to dry to the touch, but do not put the piece into any kind of real use for at least 2 to 3 days — it needs that time to reach sufficient hardness. Below 80°F everything takes longer.

For the first couple of weeks after curing, the surface is more prone to scratching than it will be later, so coasters and placemats are worth the effort during that period. The epoxy continues to harden as it ages.

For ongoing care, clean the cured surface with a solution of mild anti-bacterial soap and water. Harsh cleaners and kitchen chemicals that are not meant for plastics can cause the finish to soften or feel tacky.

Colour, embedded objects and the amber question

Clear is only one option. The product works with mica powders, liquid pigments and most other epoxy tints, which is how the marbled and metallic table tops you have seen are made.

You can also embed things. Pictures, articles and maps can be set into the surface, though thin paper like newsprint or magazine stock has to be sealed first with white glue or laminated in plastic, or the epoxy soaks in and turns it translucent. Most photo-quality paper does not need that step. Solid objects — wood, rocks, shells, bottle caps, coins — can be embedded too, but every porous object has to be sealed first or it will release tiny bubbles around itself during the flood coats. Lightweight items should be glued down so they do not float.

One honest note about clarity. While the product is considered clear by epoxy standards, it does carry a very slight amber tone. At depths up to about 1/2 inch that is virtually unnoticeable. In greater depths it can start to show, particularly over light-coloured surfaces. If you are building up real thickness over a white or pale substrate, that is worth a test piece.

When it goes wrong: a troubleshooting guide

The whole surface is soft, wet or sticky after 48 hours. This is almost always under-mixing, or measuring that was not accurate. If the surface is hard but only slightly tacky, you can apply a fresh flood coat over the whole thing and the new material will cure hard, assuming you follow the mixing procedure properly this time. If it is genuinely wet and soft, remove as much as you can with a paint scraper or knife, using denatured alcohol or acetone to help, then remix and apply a new flood coat.

Isolated sticky or soft spots. The usual cause is scraping or brushing out the mixing container while pouring. Same fix, scaled down: if the spots are only slightly tacky, re-pour over the entire surface. If they are soft and wet, cut or scrape out the soft material, use your first re-coat just to fill the depressions you have made, let that set at least four hours, and then do a full re-coat over everything.

Bubbles across the entire surface. Work back through the causes: no bubble-removal pass was done, the seal coat was skipped or applied too thin for porous wood, the mix was whipped or stirred too aggressively, or a brush was dragged too hard while spreading. Drill mixers are a common culprit here. Usually the bubbles are not noticeable enough to be worth further work; if they bother you, sand or grind the surface back and re-coat.

Bubbles in one spot only. That is a knot, crack or hole that was not properly sealed, releasing air steadily through the cure — or simply a patch missed during the seal coat.

The surface cured uneven, with ripples or waves. Three usual causes: the wood underneath was too warped for one coat to level out, the flood coat was applied too thin to self-level properly (it needs a full 1/8 inch), or too much heat was held in one place during bubble removal. Another flood coat of proper thickness will hide almost all of it.

Before you start

Do a trial run. This is the advice McKinnon puts in capitals in its own instructions, and it is the cheapest insurance available on a project like this. Mix a small batch, pour it on a scrap board, and see how the material behaves, how long you really have to work, and what the cured finish looks like. You will learn more in that half hour than in any amount of reading — including this.

You will want gloves (latex, nitrile, vinyl or neoprene), graduated mixing cups, clean stir sticks, a rubber squeegee, foam or nylon brushes that will not shed bristles, denatured alcohol or acetone for cleanup, a propane torch or heat gun, and drop cloths. Wear eye and skin protection throughout.

Full written instructions, coverage tables and the technical data sheet are on the EZ Coat instructions page and the technical data sheets page. If you get partway into a project and hit something this guide does not cover, call us at 888-849-0588 — we would much rather talk it through before the pour than after.

Frequently asked questions

What is the mixing ratio for table top epoxy?

EZ Coat is mixed at a 1 to 1 ratio by volume — one part resin to one part hardener. Measure it with clean graduated cups rather than estimating. Epoxies are formulated to cure at a specific proportion, and varying from 1:1 can leave a surface that never fully cures.

How thick is one coat of table top epoxy?

Each flood coat self-levels at approximately 1/8 inch. If you want more depth than that, you apply multiple coats rather than one thick pour. No single pour should exceed 3/16 inch, because a thicker pour generates excess heat, which causes more air bubbles and can lead to cracking and shrinkage.

How long does table top epoxy take to cure?

At 80°F it dries to the touch in roughly 12 to 14 hours. It should not be put into normal use for at least 2 to 3 days, which is the time it needs to reach sufficient hardness. Lower temperatures extend both figures. The surface continues to harden as it ages.

Why is my epoxy still sticky after two days?

The two usual causes are under-mixing and inaccurate measuring. Mixing takes longer than most people expect — up to 5 to 7 minutes for a gallon — and it is not finished until every hazy streak has cleared and the mix is completely transparent. If the surface is hard but slightly tacky, a fresh flood coat over the whole piece will cure hard. If it is wet and soft, the soft material has to be removed before recoating.

Do I really need a seal coat?

For porous surfaces like wood, yes. The seal coat is a thin brushed-on layer whose only job is to close off the surface porosity so that trapped air cannot rise into your flood coat. Skipping it is one of the most common reasons a finish ends up full of bubbles that cannot be removed.

How much epoxy do I need for a table?

Plan the two coats separately. A seal coat covers about 48 square feet per gallon; a flood coat covers about 16 square feet per gallon. An 18 square foot table with one seal coat and two flood coats works out to roughly 2.6 gallons of mixed material in total.

Can I use table top epoxy outdoors?

It is water resistant and resists yellowing, but it does not provide 100% UV protection, and McKinnon's own instructions say this should be carefully considered before applying in an outdoor, high-UV setting. A covered or shaded location is a very different proposition from a surface in direct sun all day.