Can You Use Drywall Mud on Wood?

Can you use drywall mud on wood? Yes, you can. Also known as joint compound, joint cement, or wood cement, drywall mud is safe for any wood with a rough surface from water damage.

The cement fills in the gaps between the linking drywall boards or panels, so your wall will be smooth.

Something to consider when using joint cement is that it will not stick well to shiny surfaces. You would need to apply primer first to get it to seal.

Some people may prefer wood cement, but the fact is that drywall mud is cheaper and easier to use. It is generally used on wood that you plan to paint.

Wood cement also turns white when it is dry, making it visible against the wood, which you probably don’t want.

Types of Wood You Can Use With Drywall Mud

If you can feel gaps in the wood, then your wood has a rough grain. Plywood is an example of wood to which you can apply the joint compound.

Redwood, oak, and birch are also examples of rough-grain wood.

Another type of wood that can withstand drywall mud is oriental strand board or OSB, a compressed panel consisting of wood pieces sealed together.

Do not use joint compound on wood that is wet or that may become wet, such as a deck, or wood near faucets.


How to Make and Use Your Drywall Mud

You can buy drywall mud that is ready to use. If you can’t find it or you prefer to make it yourself, here are the instructions:

  1. Drywall powder includes guidelines to help you mix the correct amount with water. The cement should be the consistency of a paste.
  2. Using a putty knife, apply the compound to the gappy areas of the wood and spread it evenly. Be sure to remove any excess putty before it dries.
  3. Smooth over the repaired area with fine sandpaper, in sync with the grain to avoid damage to the wood. Feel the surface to see if it is smooth and level. If indicated, add compound or re-sand to get the look and feel you need.
  4. Now it’s time to paint your wood.
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Frequently Asked Questions

Q: How do I know when I have the right consistency of drywall mud?

A: It will probably take several tries before you get the thickness you want. If it is too thin, it will drip, but putty that is too thick may not spread well. The directions on the package may help you figure it out.

Q: What size of a gap will drywall mud cover?

A: Areas more than 0.5 inches need filling. Consider doing this before taping it, so the putty will stay in place.

Drywall mud also safe to use on any wood with water damage that may need a touch-up before painting or wallpapering.

Q: I have had drywall mud in my garage for some time. Is it still good to use?

A: Read our article on this very topic! Does drywall mud go bad?