How to Use Joint Compound. Joint compound does what its name implies - it fills joints between drywall. Here's how to use it correctly, as well as a few tips on other helpful uses for this stuff.
Things You'll Need
- Joint Knives
- Drywall Joint Tape
Finish a drywall joint by applying joint compound directly to the joint with a joint knife. The layer should be about 1/8 inch thick.
Smooth a strip of joint tape over the area. (Tape with adhesive doesn't require the first layer of joint compound.) Press the tape down firmly with a joint knife, squeezing out air bubbles and excess compound.
Let it dry. This could take up to 24 hours.
Sand any areas that poke up and cut off any tape that sticks out or has obvious bubbles under it.
Apply a thin coat of joint compound about 6 inches wide over the taped area.
Let that layer dry.
Sand the compound down so it's smooth and flat.