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How to waterproof the wood in the bathroom

Deterioration is imminent when the wood you use in designing your bathroom's floor or your sink and vanity dresser is constantly exposed to moisture.

Since this is a sad reality on the ground, how do you protect the wood from moisture? How do you preserve this beautiful wood floor finish without causing the wrath of water, hence the big question all the time -- how do you waterproof wood in a bathroom to avoid damage from the moisture that is always present in the bathroom?

The good news is that this article will answer that boiling question. All you need to do now is to keep reading.

How to Waterproof Wood for Bathrooms.

In a bathroom world where water rules, there are three failed methods you can use to waterproof your wood.

But you need to know this first: there is a fine line between waterproofing and waterproofing wood.

So when the next assurance is given to you that a particular piece of wood is waterproof, it means that it can resist water up to a certain limit, but at the end of the day, it will eventually give in to the elastic force of water. On the other hand, wood that has been treated to be waterproof means that the wood will never be affected by the forces of water.

This is the perspective I will show you in this article. You use the following three ways to make your wood waterproof forever. Three fantastic options once the choice is made for you to make. We've talked a lot about this in the introduction, so let's start with the first method.

The first method. Waterproofing the wood with oil

There are three choices of oils that you can use to waterproof your wood. There is linseed oil, walnut oil, and tung oil. Whichever oil you decide to use, the following procedure will help you waterproof your wooden bathroom trim and keep water at its bay.

  1. Mix the oil with turpentine or apple cider vinegar for a more powerful waterproof oil. Make sure you mix thoroughly. This isn't necessary because you can still use this oil alone.
  2. Prepare the surface of the wood by smoothing out rough surfaces and edges with sandpaper. Rough surfaces will become visible and will look unsightly when you are done oiling, which is why this step is important.
  3. Using a soft-bristled brush dipped in oil (either a mixture or a single oil), apply it thoroughly around the wood, leaving no surface or edge untouched.
  4. Allow the surfaces and edges of the wood a little time to absorb the oil, which will allow you to identify untouched areas, and then you can reapply the necessary coats in those areas.
  5. Allow the wood to absorb the oil again, then wipe off the oil residue with a clean, dry rag.
  6. Allow time for the wood to dry. A mixture of oils dries faster than a single oil. If you use a single oil, the drying time may take several hours, or even half a day.
  7. After you have allowed the wood to dry, if you have more oil, you can then reapply the oil to the dried wood surface to make sure it is heavily treated and waterproofed.

Other considerations for using oil

  • Although some oils are mixed with other chemicals, you can do your own mixing and feel free to experiment as you continue to do so after a long period of time.
  • If you are buying an oil that has been mixed, know that it has three parts, namely: linseed or tung oil, mineral oil and polyurethane. The mineral oil and polyurethane are added to the main oil (tung oil or linseed oil) along with turpentine and mixed thoroughly before use.
  • You can obtain linseed oil naturally and boil it before use. You can always find it readily available in DIY markets.
  • If you want a thicker combination, keep the addition of mineral oil to a minimum.
  • Adding polyurethane can increase or decrease drying time. If you want to speed up the drying time, add more. If you want more time to work before you start drying, add less.
  • After application and drying, give the wood some time to settle and absorb what it has just received. A few hours is not enough. A day or two will do. Never use it immediately after finishing.

Oil-laden rags are flammable, so remember to wash them with soap and water when you wipe off the oil residue with them for reuse.

Second method. Waterproofing wood with a sealer

This method involves waterproofing the wood with a sealer. The steps for application are almost identical to those for oil.

The only difference is that you don't necessarily have to mix the sealer with any other natural or synthetic chemicals. However, you must dry the wood and sand it with sandpaper, which completes the preparation work before application. After that you can apply the sealer by spraying or using a brush. After you finish spraying or applying with a brush, please wait for it to dry. Then apply two more coats to make sure your wood is well protected against water.

Other things to note when using sealer

  • For perfect results, apply the sealer at room temperature, temperatures higher than this will affect the effectiveness of the sealer.
  • Do not stir or shake sealants. They do not need to be shaken as vigorously as other liquids to allow full circulation of the contents in the container.
  • They dry more quickly than oils, but you still want to allow air to pass freely through any application being made.
  • After application and drying, give the wood enough time to absorb the protection it has received before you start using it. any amount of time within 3 days is sufficient.

Third method. Waterproofing the wood with a stain and sealer

This happens to be the most effective and elegant method of waterproofing bathroom wood. Why? Because you can choose to use the stain alone, or you can do a powerful stain-sealant combo. These stains are translucent when applied. The lighter stains carry more oil. They are best used on interior wood, such as your bathroom, which is the center of everything detailed here.

The application process is no different than the other two. Dry the wood, smooth the surface with sandpaper to limit imperfections in your work, then apply with a brush. Allow it to dry, remove the residue with a clean, dry rag, and apply it up to two or three more times afterwards to achieve a thorough finish. This applies to a combination of stain and stain sealer.

Why is the stain-sealant combination the ultimate?

Stain-sealer combinations are the best when it comes to effective waterproofing and adding style to your work.

They come in a variety of colors. Just because you want to waterproof your wood doesn't mean it should lose its aesthetic appeal.

These colors are products of colored pigments containing oil, water or alcohol-based binders.

Stain-sealers barely build up on the surface and they are absorbed into the wood as soon as they are applied, so there is no need to wipe off the residue because they evaporate before you can do so. Alkyl-based stains, however, leave a residue on the surface of the wood.

Other notes on stains and stain-sealer combinations

  • However, if you intend to use them on exterior wood, you will need to find an exterior grade stain for this purpose, and you must continue the waterproofing treatment at least after every two-year interval.
  • Oil-based stain-sealer combinations with colored pigments and adhesives are best suited for interior wood, like the kind you would use in a bathroom. However, although they leave a build-up on the surface of the wood, their alkyl-based counterparts provide more aesthetic appeal to interior woods.


Although they look rustic, and yes they are, you could say they are dated, no doubt, but they make the best furniture and cabinets. These natural building materials known as wood need to be protected from moisture. Wood and moisture can never live in harmony, not now, and maybe in the near future.

The method you choose here depends on the budget you have set aside for this project. If this is a large project involving the entire house, you may choose the last method; stain-sealer, which offers more efficiency and saves time. Remember to take some thumb rule precautions such as using gloves. You are dealing with chemicals not just liquids.

Wash your hands after you've completed the entire process, including the tools you're using. Don't forget to keep them out of reach of children.

Water shouldn't be the reason you can't have this rustic goodness on your bathroom floor, in your sin or dresser vanity or anywhere around the bathroom where you intend to use wood. That's why you need to arm yourself with this information on how to waterproof your bathroom's wood.

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