How to Refinish the Bathroom Vanity Top with Epoxy Resin

Bathroom Vanity with DIY Epoxy Resin

Have you ever wanted to replace your bathroom vanity top? Maybe you didn’t like the color or you wanted something more stylish. But after shopping around you were surprised at the cost? Especially if you have a non-standard, custom length vanity top, the price doubles. Personally, I was shocked to see an estimate of $1000 to cut a custom vanity slap with two sinks for our bathroom. So I decided to look for a cheaper alternative. Instead of completely replacing the top, I refinished the bathroom vanity top with DIY epoxy resin. The cost of the epoxy resin was less than $150. 

What is epoxy resin?

Epoxy resins are known as polyepoxides, a class of reactive prepolymers and polymers which contain epoxide groups. Epoxy resins may be reacted (cross-linked) either with themselves through catalytic homopolymerization. These co-reactants are often referred to as hardeners or curatives, and the cross-linking reaction is commonly referred to as curing. Epoxy could be used in a wide range of applications, including metal coatings, use in electronics/electrical components/LEDs, high tension electrical insulators, paintbrush manufacturing, fiber-reinforced plastic materials, and adhesives for structural and other purposes.

Epoxy has become a rising trend among DIYers looking for cheap countertops or creative ways to update their bathroom and kitchen style without breaking the bank. Mixing and applying a coating of this material can help restore or revitalize old, worn out, or out-of-style bathroom countertops, kitchen countertops, and floors.

You cannot pick up epoxy in pre-made slabs from a supplier and have it installed in your kitchen or bathroom. Rather, it’s a type of refinishing product that you buy in the form of an epoxy countertops kit and then use to refinish an existing material.

DIYers commonly place epoxy over wood, laminate, concrete, or ceramic. The popularity of epoxy is due to durability and scratch resistance. It can tolerate most of the cleaning materials without losing its shine. 

Epoxy countertop design and colors

The results can be absolutely amazing and unique by adding different colors or by mixing the metallic powder with alcohol and spreading over epoxy. Any design, pattern, or color you can imagine is possible. The colors could be added during the mixing of part A and part B or applied after the epoxy has been spread on the countertop. 

Check out Stone Coat Countertops website for additional designs and possibilities.

You also might be interested in the dining table I built using epoxy resin and a matching bench with curved legs.


Time to Complete

12 hours

Total Cost

$140

Skill Level

Intermediate


Disclosure: Some of the links on this page as well as links in “tools for this project” and “material list” sections are affiliate links.


Step 1 – Remove Backsplash

Before applying epoxy to any surface, it is important to clean and prepare the surface so that epoxy will bond properly and not come apart in the future. For the best results, you want to have the surface horizontally leveled. If the surface is vertical or sloped in one direction, the epoxy will follow the gravity and slowly flow down in the direction of the slope. Although it is possible to apply epoxy on the vertical surface, the coloring method is slightly different than using a horizontal surface.  

My bathroom vanity had a vertical backsplash that has been glued to the wall with a waterproof sealant. So the best solution for me was to remove the backsplash completely and apply epoxy when it’s in a horizontal position. After the epoxy completely cures it’s very easy to glue it back on the wall.

To remove the backsplash, take a razor knife and cut through the sealant. Typically the sealant is applied on all sides of the backsplash to prevent any water running down behind the sink. Make sure to cut the sealant on top at the drywall and the bottom between the vanity and backsplash. Then take a screwdriver and carefully pry it away from drywall. Be careful not to press on the drywall too hard, otherwise, you’ll damage the drywall and that will create extra work fixing it.

Some of the vanities out there have a backsplash that is not removable. So you have to keep in mind that epoxy will try to slide down when applying it on the vertical surface. In this case, most of the color design will need to be done before applying the epoxy. 

Some people question if the bathroom vanity needs a backsplash. You may choose not to install it altogether.

cutting silicone to remove backsplash
cutting silicone to remove backsplash
scraping off silicone from wall

Step 2 – Remove Old Sink Faucets

The next step is to remove the faucets. Removing the faucets is quite simple. First, under the sink turn off the hot and cold valves that serve water to the faucets. Then unscrew the flexible hose from the faucets. Place a bucket under the sink to catch any water trapped in a hose. Once the hose is removed, unscrew the locknuts and pull out the faucet from the vanity top.

Some people apply epoxy without removing the faucets, but it’s much harder to work around the faucets and it makes the job sloppy. The faucets in our bathroom were old and had to be replaced, so I really didn’t have a choice.

removing faucets before applying epoxy

Step 3 – Scrape Off Old Sealant and Buildup From Counter Top

After the backsplash and faucets are removed, take a putty knife, and go through the vanity top and scrape off any old sealant and buildup. Then spray TSP cleaner (trisodium phosphate) over the countertop and wipe it off with a shop towel. TSP cleaner removes grease and oils from the surface. If epoxy is applied on a greasy or oily surface, it will not bond properly and eventually come apart. Don’t forget to do the same cleaning process with the backsplash. 

scraping buildup from counter top around fausets
scraping off old sealant from backsplash
spraying tsp on countertop
spraying tsp to clean the backsplash
using shop paper tower to clean countertop

Step 4 – Sand the Vanity with 320 Grid Sandpaper

After all of the grease and oils are removed use a random orbital sander with a 320 grid sand disk to sand the vanity top. Make sure to sand the surface after TSP cleaner, otherwise, you’ll just spread the grease around the surface with sandpaper. The sandpaper makes the countertop surface slightly rougher which makes the epoxy bond better. The goal is to have epoxy stay on the countertop for a long time.

sanding counter top for epoxy

Step 5 – Cover Any Gaps Between the Wall and Vanity

Typically, most walls have some sort of texture on drywall. This texture makes the wall uneven with high and low spots throughout the wall. Since the countertop is installed against the wall, you’ll see small gaps between the wall and the countertop. If these gaps are not filled, the epoxy will run down through those gaps behind the sink. To fix this problem, use silicone sealant to cover these gaps.

Some vanities are installed with much larger gaps and most likely could not be filled with a sealant. You might need to use bondo for those larger gaps.

covering gaps between vanity and wall for epoxy

Step 6 – Apply Bonding Primer Over the Surface

Before applying the bonding primer, I taped the sink with scotch tape and Visqueen sheeting. Originally, I didn’t want to apply epoxy in the sink because it was already white. But then I realized that the sink white color was slightly different than epoxy color so I did end up using epoxy inside the sinks as well. If you choose not to apply epoxy in the sink, then make sure there are no gaps or holes in Visqueen, otherwise, the epoxy will seep thru into the sink. Also, tape around the vanity so you don’t get primer and epoxy on the walls or cabinet; then apply bonding primer on the surface.  Plug-in the faucet openings at the top of the vanity so that you don’t have epoxy dripping down into the cabinet. I used small 4×4 foam pieces to plug in the openings.

taping sink for epoxy
preparing sink for epoxy
taping around vanity top to use epoxy
covering holes to use epoxy

Step 7 – Mix the Epoxy

The epoxy kit comes with part A and part B that would need to be mixed together before applying it on the surface. First, determine how much epoxy you need for your project. Measure width by the depth of the surface in feet and then multiply the two numbers together. For example, my vanity is 5 feet wide and 2 feet deep. If you multiply the two numbers together you’ll get 10 square feet of surface area. To cover 10 square feet, you’ll need a total of 1/2 a gallon (2 quarts) of epoxy (that’s mixed together). 

When mixing the epoxy, use a bucket or a pail with measurement lines so that you could accurately mix 1:1 ration. First, pour 1 quart of part B into a bucket and then 1 quart of part A. I usually leave Part A in the sun for some time to warm it up before mixing. Part A flows much better when it’s warm. Then use an allway helix paint mixer to mix the epoxy. For best results, you’ll need to mix it for at least 5 minutes.  

Epoxy is clear by itself, so to make the base color white, add two teaspoons of white epoxy Gelcoat pigment paint into the bucket. Make sure everything is mixed well before applying it to the vanity. 

adding part b epoxy to bucket
mixing epoxy resing
adding white color to epoxy resin

Step 8 – Spread Epoxy Over the Vanity Top

Now pour the epoxy throughout the countertop and spread it with a patty knife or with a chop brush. Let the epoxy drip over the edges and use a chop brush to spread it evenly on the edges.

spreading epoxy over bathroom vanity

Step 9 – Draw Black Random Lines Across Epoxy

Once the white-colored epoxy is evenly spread out, now its time to add some color. You could make this as creative as you would like and use whatever colors you’d like. But to make it simple I just used black spray paint to add few lines to make it look like marble. First, take black spray paint and spray a small amount on the tip of a mixing stick. Basically, you’ll use this stick like a pencil for you to draw over epoxy. If you want the lines darker, then spray more black on the tip. Then draw random lines with this mixing stick across epoxy.

Then take a hair blow dryer and blow on the black lines with hot air. When epoxy warms up, it becomes softer and runnier and the air moves the epoxy. Now the straight lines that you drew with a mixing stick could be shifted or curved with a blow dryer. You could blow air in any direction making this as artistic as you like. 

Step 10 – Remove Bobbles with a Torch

When spreading epoxy over the vanity top, you’ll have bubbles that form during this process. To eliminate these bubbles you need to take a propane torch and quickly run through the top keeping the flame about 8″ from vanity. The fire heats up the epoxy and the bobbles pop. If you still see some bobbles go through it again. Do not overdo with the torch; this can give a yellowish tint to it.

using torch to remove bubbles from epoxy resin

Step 11 – Scrape off Dripping Epoxy at the Edge

The final step is to scrape off any dripping epoxy at the edge of the vanity. During the curing time, you’ll need to repeat this process every half an hour on vanity and backsplash until it does not drip anymore. But if you forgot to scrape off dripping epoxy, you could always remove the droplets with random orbital sander the following day once it cured. Let the epoxy cure for 72 hours before installing any faucets or attaching the backsplash.

using sander to sand backsplash

Step 12 – Install the backsplash and faucets

When installing the backsplash, you want to make sure you’re using a waterproof sealant. I taped the backsplash and vanity so that I don’t make a mess with sealant. Once the backsplash is in place, remove the tape. You’re done with this bathroom vanity with DIY epoxy resin. 

applying silicone on backsplash
attaching backsplash to wall

I took a picture of how our bathroom vanity looked before the epoxy resin.

bathroom vanity with two sinks

20 thoughts on “How to Refinish the Bathroom Vanity Top with Epoxy Resin”

  1. I discovered this product this week and I have been watching the videos because i am think by doing a table for my craft room using this product . I’m scare but I’m willing to give it a try. I will commenting on the experience once I finish with the project . I think a Correa marble would look super with black shelves.
    Wish me luck lil

    Reply
    • Can you use car paint with epoxy ?

      We’re doing a bath and would like to use a silver and red metallic with a gloss black.

      Left over from cars gone by…

      Reply
      • Hi Jenn, Yes you should be able to use car paint with epoxy. I would do a small sample test just to see if you like how it looks before using it on the bath.
        I used many different spray paint types with epoxy and it looks great.

        Reply
    • Hi Nichola, I’ve watched a lot of videos on how they cover the vanities with epoxy (Stone Coat Countertops) and they usually do not cover it with a second layer. If you have wood or some texture that you want to protect, then it makes sense to have a clear protective layer.

      The vanity is still looking good. I’ve also made a kitchen table with epoxy about a year ago, and it still looks like new, and I have three small kids.

      Reply
    • Hi Mark, It will run down especially when you just apply it. I placed a clean container under the sink to catch the epoxy, then poured it over the bowl again. When you just mix the epoxy it’s very runny, but slowly it hardens and does not run off the vertical surface as fast. You will need to reapply it several times. Either way, the vertical surface will have a much thinner layer then the horizontal surface.

      Reply
    • It’s harder to apply epoxy over the vertical surfaces because it flows down, so you’ll have a very thin layer on the vertical surface and a thick layer on the horizontal surface. When you get a thin layer, it becomes slightly transparent and you could see the original color of the vanity.

      Reply
  2. You did not show how to vain the countertop to look like marble.

    I’m working on a bathroom vanity and want to know how to make it look like marble…

    Thank you.

    Reply
    • Hi Charmaine, I took black spray paint and sprayed a little bit on a paint mixing stick and then drew a few veins across the epoxy. Then used a hair blower to spread that vein in different directions.

      Reply
      • what do suggest if the double sinks bowls and the rear backsplash are one piece? The rear backslash under the mirror curves upward and the double sinks are receded. Is it possible to just add tape around the sinks?
        Thanks

        Reply
  3. Thanks for the advice ! I will be tackling this project for fun this week. (As long as our local stores have everything in stock) I can’t wait !!

    Reply
  4. Hi just came across your article and I’m about to do my bathroom vanity top as well. I would like to do my sink bowl- how did you prevent the resin from sealing up or going down the drain. What did you use to prevent that? Thank you for this informative article and any response.

    Reply
    • Hi Brie, I disconnected the plumbing under the sink and placed a small container to catch the epoxy that would run down the sink. Once the epoxy is completely cured, then you will need to reinstall the plumbing.

      Reply
  5. Do you notice any yellowing of the resin? I am getting ready to do our bathroom countertop and the instructions suggest not using white as a base color.

    Reply

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