How to Waterproof Painted Wood Furniture for Outdoors

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If wooden furniture is not waterproof then it is very susceptible to rotting, or cracking, also furniture for indoor use is not suitable for outdoor use.

So if you want to use these woods outdoors and expect longevity then waterproof treatment of these products is essential.

In this article, we will show you how to waterproof your painted wood furniture for outdoor use.


The easiest and most convenient way to waterproof your furniture to make it suitable for outdoor use is to apply a sealant. This makes your furniture more durable. The sealant changes the look of the woods and gives a beautiful and shiny finish.


Clean the painted wood:

Mix liquid detergent (a quarter) with one gallon of water in a bucket. Mix the mixture well. Then rub the painted wood surface well with a cleaning brush.

Wash and dry:

Apply water to furniture with a hose and clean well. Then let it dry, it may take 3 hours to dry.

Apply primer on the wood surface:

Apply the primer to the wood surface before applying the sealant to make the sealer more durable. Coat the primer evenly on each area of ​​the surface with a brush.

Apply sealant:

Apply polyurethane, varnish, or a sealant. Apply the sealant evenly to the wood surface with a paintbrush.

Dry the surface:

After applying the sealant, dry it well. It may take 24 to 48 hours to dry.


In this process, you can use linseed, walnut, and tung oil to make your woods waterproof. These oils are good for several years. These oils are great for your functions.

Decide with which oil you want to do the waterproofing process. Tung oil is basically more expensive than other oils, this oil is better to use in your small project. This tung oil is available as a blend in commercial products. Walnut oil is available in grocery stores. And linseed oil is available at DIY repair shops.

Consider how many wood projects you want to treat. Then determine how much oil you need, buy oil accordingly.

Make a mixture of oil:

You can add turpentine and apple cider vinegar to the oil for a more robust finish in wood furniture. Mixing all the ingredients together will create a strong sealant that will provide a more durable finish to the wood.

Take one part linseed, tung, or walnut oil, one part turpentine, and 1/2 part vinegar in a bowl. Now shake all the ingredients well.

Prepare the wood before applying the oil:

The surface needs to be well prepared for oil absorption, as the oil mixture will make the imperfections of the wood surface more noticeable. So scrape the wood surface well with sandpaper.

Apply the first coat:

Pour a small amount of oil mixture over the surface of the wood and rub the oil with a paintbrush. Use gloves when performing this procedure.

Dry the coat:

Remove excess oil from the surface with a clean cloth. Let the oil absorb well on the surface and leave it for some time to dry. It may take 24 hours to dry. Now rub the surface with steel wool.

After drying, apply two more coats:

Make sure the oil mixture dries well on the surface. Now apply another coat on the surface and let it dry. Repeat this process. And sanding with steel wool.

Now give it a few weeks to heal before using wooden furniture.

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