How to Caulk and Seal My Kitchen Sink

Properly sealing a sink keeps it more sanitary and free of mildew.

When a kitchen sink is set into a countertop, a "bead" of caulk is applied around the sink edge to seal the sink and countertop together. This seal keeps any water splashing out of the sink from seeping between the sink and the countertop's edge. Failing to seal this area properly commonly results in rotted countertops, rusty sinks and mildew growth. Clear caulk is the best choice for this task.

Things You'll Need

• Kitchen/bath clear adhesive caulk
• Caulking gun
• Utility knife
• Painter's rag

Instructions

1. Load a tube of caulk into a caulking gun and cut the tip off with a utility knife. Push in the ratcheting plunger until it connects with the back of the tube of caulk. Squeeze the trigger until a little caulk comes out of the nozzle tip.

2. Hold the gun at a 45-degree angle along one of the edges of the sink where it meets the countertop. Pull the trigger and begin moving the gun around the sink's edge. Move at a speed that allows a 1/4- to 1/2-inch-wide bead of caulk to create a seal completely around the sink.

3. Wet your finger and glide it over the bead of caulk so that the bead becomes concave. This allows the bead to seal the joint between the sink and the countertop. Wipe off any excess caulk piling up on your finger tip on a painter's rag to keep the caulk looking uniform all the way around the sink. Allow the caulk to "cure" (dry) for 24 hours before using the sink.

Tips & Warnings

• Ensure the joint around the sink is completely dry and free of debris before applying the caulk.