Return to How To's & Project Ideas

How to Seal around A Bathroom Sink

Print this article Share

Newly installed sinks will require sealing; as will old sinks that may have become loose from the wall. Sealing prevents water and dirt running down the wall behind your sink. Our step-by-step guide will help you seal your sink with a professional finish.

Step 1

Clean Area

Clean Area

Ensure the area is clean and dry with no soap residue on, around or behind the basin.

Step 2

Apply Silicone Sealant

Apply Silicone Sealant

Cut the tip of the silicone sealant tube to the width of the crack between the basin and the wall. Insert the tube into the mastic gun and pull the trigger until the silicone begins to come out. Wipe away excess. Using a steady, even stroke, apply the silicone in a thick bead deep into the crack between the sink and wall.

Step 3

Smooth Out Sealant

Smooth Out Sealant

Prepare a solution of 50% washing up liquid and 50% water. Dip your finger into the solution and gently run your wet finger over the bead of silicone until the silicone is smooth. This will leave a smooth, professional finish.