What can I put on my exterior wood to protect it?

Author: Bettye Heathcote  |  Last update: Saturday, October 28, 2023

There are several types of finishes that work well for outdoor wood, including polyurethane, lacquer, varnish, and epoxy. Choose a finish that is appropriate for your specific project and follow the manufacturer's instructions for application.

What can I put on wood to protect it outside?

1. Apply a coat of polyurethane, varnish, or lacquer to protect the wood from penetrating humidity and moisture that can seep into your deck and other outdoor wood furnishings. 2. Finish and waterproof wood with a professional-grade wood stain and sealer combo and repaint when necessary.

How do you weatherproof outdoor wood?

How to Waterproof Wood in 6 Steps
  1. Clean the Surface. You'll want to remove dirt and residue from the wood beforehand, which can be done with dish soap or a cleaning solution. ...
  2. Sand It Even. ...
  3. Apply Waterproof Finish of Choice. ...
  4. Sand It Again. ...
  5. Apply Second Coating. ...
  6. Allow Drying Time.

How do you protect untreated wood outside?

Untreated wood is the most susceptible to rot, fungi, and general weathering. It's extremely important that you use a wood preservative first. You can either use a wax enriched preservative for an all-round coating or alternatively use a wax-free preserver if you want to then use a stain or a paint on top.

Should you seal outdoor wood?

One of the most important steps you can take to protect outdoor wood furniture is to use a sealer. A sealer is a transparent finish that is applied to wood to protect it from moisture. Sealers work by penetrating the wood's pores and preventing water from entering.

How-to Seal Wood for Outdoor Use DIY

What is the best wood preservative?

Product Guide: The Best Wood Preservers Compared
  • Wood preserver being applied.
  • Preserved and painted shed.
  • Ronseal Multi-Purpose Wood Treatment.
  • Cuprinol Wood Preserver Clear.
  • Ronseal Total Clear Wood Preserver.
  • Barrettine Premier Universal Preserver.
  • Barrettine Premier Wood Preserver.
  • Osmo End Grain Sealing Wax.

How do you seal and paint wood for outdoor use?

  1. Clean Painted Wood. Mix the TSP with warm water in the clean bucket. ...
  2. Lightly Sand Painted Wood. ...
  3. Remove Dust. ...
  4. Apply Polyurethane Sealer. ...
  5. Sand Cured Polyurethane. ...
  6. Remove Polyurethane Dust. ...
  7. Apply More Coats of Polyurethane Sealer.

What is the cheapest way to protect outdoor wood?

Varnish is great option to treat untreated wood for outdoor use because it's relatively cheap and provides superior protection for your wood. It can also last longer than some other sealants, which is something we all want.

What do you treat outdoor wood with before painting?

For exterior wood such as decking it's a good idea to apply a coat of wood preservative prior to painting. This is particularly important where treated wood has been cut or will be exposed to harsh weather conditions. A quick drying preservative can be used to speed up the process.

How do you protect wood without changing color?

How to seal wood without darkening the natural color:
  1. Sand with a very high grit - the higher the better! ...
  2. Clean with Krud Kutter. ...
  3. Water down white paint and lightly whitewash the wood. ...
  4. Use a sponge brush to eliminate brush strokes, and apply the General Finishes Flat Out Flat topcoat.

What paint to use to protect wood outside?

You can go with either oil-based paint or latex (water) exterior paint. In terms of the best paint for wood siding, you can go either way as well. If you want to go the easy route though that can be maintained nicely, opt for latex paint for your wood siding.

What is the best finish for outdoor wood?

Use an outdoor-rated finish like polyurethane, epoxy, lacquer, or varnish. Make a natural oil finish with one part tung or linseed oil, one part mineral spirits, and one part polyurethane. Use a stain sealant combo that gives your wood some color and a durable finish all in one.

How do you keep wood from rotting?

Tips for Preventing Wood Rot

Always use decay-resistant or pressure-treated lumber for decks. Wood that touches the ground should be pressure-treated lumber that's rated for ground contact. When building an exterior project with wood, stain or paint all sides of each lumber piece before assembly.

What is the best clear waterproof finish for wood?

Polyurethane Wood Finish

Polyurethane wood finishes are synthetic coatings that are highly durable and water resistant, making them the best clear coat for wood protection.

Does vinegar stop wood rot?

One popular remedy for wood rot is vinegar because vinegar's acidity has the ability to act as a fungicide that kills off fungal spores.

How do you preserve old weathered wood?

How To Revive Old Wood
  1. Sand Lightly. Using something like 120-grit sandpaper make sure there isn't any dirt or loose wood fibers lingering. ...
  2. Apply Oil. Mix up a 50/50 solution of boiled linseed oil and turpentine. ...
  3. Prime & Paint. Using a good oil-based primer, cover the bare wood after the oil is cured.

Is polyurethane good for outdoor use?

Most exterior polys can be used indoors, but interior polys should never be used outdoors; they lack the additives that protect exterior finishes from UV rays.

What kind of oil finish for outdoor wood?

Teak oil is generally considered the best oil to treat wooden garden furniture. It provides year-round weather protection whilst emphasising the wood's natural colour. It does this by replacing the natural oils that are lost through weathering, and preventing the wood from splitting and warping.

Is polyurethane or varnish better for outdoor use?

While polyurethane is water- or oil-based plastic resin, varnish is older and made from resins, oils, and solvents. Because of the higher ratio of solids, varnish is less susceptible to ultraviolet light damage. This protection makes varnish an excellent choice for projects such as outside decks and exterior furniture.

How do you permanently seal wood?

Apply multiple coats of polyurethane to achieve your desired finish. Apply several coats of polyurethane to the surface of the wood, waiting for each coat to dry completely in between applications. Sand between coats to smooth out any uneven areas.

Does raw wood need to be sealed?

If you leave furniture raw without applying a new coat of wax or poly you are taking a risk of your furniture drying out, cracking, swelling or staining. To limit wood damage, preserve furniture AND keep it looking natural you'll want to seal raw wood with Liming or Cerusing wax.

What happens if you do not seal wood?

Wood is dried-out and dull if you do not apply some sort of sealer. Staining and finishing are two very different things. By applying pigments, a stain is meant to darken or dye wood, but the wood is not preserved by staining.

What happens if you don't seal wood before painting?

Sealing or sizing a piece of wood greatly reduces the chance of stains, warping and rotting wood from your paint. Yes, this can happen!

Can you leave wood unsealed?

Paint Or Seal Unfinished Furniture

Bare wood, when left unfinished, keeps your furniture with a natural wood look but the risk is exposing it to harsh elements, even if it's indoors, such as light, dust, moisture and water damage, making it more susceptible to stains, warping and cracking.

What is a natural sealant for wood?

Not only is Pure Tung Oil natural, food-safe, water-proof, and easy to apply, but it helps bring out the natural beauty of the wood. We plan to try more “green” sealing products in the future, but for now, Tung Oil is our favorite natural wood sealer.

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