Caulking Corners Of Drywall: A Comprehensive Guide

Framing at inside corners is often inadequate or lacking altogether
Framing at inside corners is often inadequate or lacking altogether from


When it comes to finishing drywall, caulking corners is an essential step that not only enhances the overall appearance of the project but also helps to prevent air leakage and moisture penetration. In this article, we will guide you through the process of caulking corners of drywall, providing you with tips and techniques to achieve a professional-looking finish.

1. Gather the Necessary Tools and Materials

Before you begin caulking, make sure you have all the necessary tools and materials at hand. You will need a caulk gun, a utility knife, sandpaper, a damp cloth, and a high-quality paintable caulk that is suitable for drywall.

2. Prepare the Surface

Start by preparing the corners of the drywall. Use a utility knife to remove any loose or protruding drywall mud. Then, use sandpaper to smooth the surface, ensuring that it is clean and free from debris.

3. Choose the Right Caulk

When selecting a caulk for drywall corners, opt for a paintable caulk that is specifically designed for interior use. This type of caulk adheres well to drywall surfaces and can be easily painted over once it has dried.

4. Load the Caulk Gun

Insert the caulk tube into the caulk gun and cut the tip of the tube at a 45-degree angle. Make sure to cut a small opening to control the flow of caulk. Load the caulk gun by pulling back the rod and inserting the caulk tube into the gun.

5. Apply the Caulk

Hold the caulk gun at a 45-degree angle and apply a steady stream of caulk along the corner of the drywall. Start from the top and work your way down, ensuring that the caulk fills the gap completely. Use a consistent and even pressure on the caulk gun to achieve a smooth bead of caulk.

6. Smooth the Caulk

After applying the caulk, use your finger or a caulk smoothing tool to smooth the bead of caulk. Wet your finger or the smoothing tool with water or a mild soapy solution to prevent the caulk from sticking. Gently glide your finger or the tool along the caulk line, removing any excess and creating a neat finish.

7. Wipe Away Excess Caulk

Use a damp cloth to wipe away any excess caulk from the surface of the drywall. Be careful not to disturb the caulk line. This step will ensure a clean and professional-looking finish.

8. Allow the Caulk to Dry

Give the caulk ample time to dry before proceeding with any further steps. The drying time may vary depending on the brand and type of caulk you are using. Read the manufacturer’s instructions for specific drying times.

9. Sand and Paint

Once the caulk is fully dry, lightly sand the surface to remove any imperfections and create a smooth finish. Then, apply paint to the drywall, ensuring that the caulked corners are well covered. Allow the paint to dry completely before applying a second coat if necessary.

10. Final Touches

Inspect the caulked corners for any visible gaps or imperfections. If needed, apply a second layer of caulk to ensure a seamless finish. Once the caulk has dried, admire your work and enjoy the professional look of your newly caulked drywall corners.


Caulking corners of drywall is a crucial step in achieving a polished and professional finish. By following these tips and techniques, you can ensure that your drywall project not only looks great but also provides enhanced protection against air leakage and moisture penetration. So, roll up your sleeves and get ready to tackle those drywall corners with confidence!