Step 1: Gather Materials

Stock up on the necessary supplies for this task, including a utility knife, caulk, a caulking gun, rubbing alcohol, painter’s tape, and a clean cloth.

Step 2: Choose the Right Caulk

Choose a mold-resistant and waterproof caulk specifically designed for bathrooms. A silicone-based caulk is usually your best bet.

Step 3: Clean the Area

Clean the area around the bathroom sink thoroughly by removing any old caulk, debris, and dust using the utility knife and cloth. Wipe down the area with rubbing alcohol to ensure a clean surface for better adhesion.

Step 4: Dry the Area

Wait until the area is completely dry before applying new caulk. Moisture can cause the caulk to adhere poorly or promote mold growth.

Step 5: Apply Painter’s Tape

To get clean lines, apply painter’s tape on both sides of where you plan to apply caulk. Make sure there’s enough space between the tapes for the desired bead width.

Step 6: Load Caulking Gun

Cut the tip of the caulk tube at an angle about 1/8-inch wide. Puncture any inner seal if necessary, insert the tube into your caulking gun, and make sure it’s properly seated.

Step 7: Start Caulking

Carefully apply steady pressure on the caulking gun’s trigger while guiding it along with the seam between your sink and countertop. Aim for a smooth bead of caulk without gaps or air bubbles.

Step 8: Bead Consistency

Maintain an even flow and consistent bead size by keeping steady pressure on the caulking gun trigger. If needed, pause occasionally to release pressure and avoid creating voids in the bead.

Step 9: Smooth Out Caulk

Following application of caulk, use your finger or a caulk finishing tool to smooth the bead of caulk into the seam for a professional appearance. Wipe off any excess with a damp cloth.

Step 10: Remove Painter’s Tape

Carefully remove the painter’s tape while the caulk is still wet, ensuring neat, straight edges around the sink.

Step 11: Inspect and Touch-Up

Examine the caulk job for any voids or spots that require touch-ups. While caulk is still wet, quickly apply additional caulk where needed and smooth it out.

Step 12: Allow Caulk to Cure

Follow the manufacturer’s cure time recommendations printed on the tube before using your sink. It usually takes 24-48 hours for most caulks to completely dry and cure.

And that’s it! With these twelve easy steps, you can successfully add a neat, protective layer of caulk to your bathroom sink and prevent water damage, mold growth, and other issues.