How to Do Silicone Beading Around a Sink

Updated April 17, 2017

Silicone sealants are an effective method to seal a sink to the surrounding countertop. They provide a flexible, waterproof seal that resists cracking. Silicone sealants come in a variety of colours and can protect against mould and mildew. They also hold up to extreme temperatures, making them ideal for both interior and exterior applications.

Clean the countertop around the sink. Use the scraper to remove prior sealant. Also clean any dirt, moisture or mildew to ensure proper adhesion.

Use the masking tape to mask off the area to be sealed. The size of the silicone seal is determined by the distance of the tape edge from the sink.

Cut the tip of the tube of sealant at a 45-degree angle with the utility knife. The larger the opening is cut, the larger the resulting bead size. Pierce the inner seal on the tube.

Insert the tube of silicone into the caulk gun. Ensure that the tip of the tube is directed away from the caulk gun trigger.

Place the tip of the tube between the sink and the tape. Squeeze the trigger on the caulk gun and steadily apply sealant.

Put on the rubber gloves. Then moisten your index fingertip and gently smooth the bead around the sink. Remove excess silicone.

Remove the masking tape once complete and allow the silicone to dry at least 24 hours before introducing water.


Refer to the product packaging to determine specific cure rates.


Make sure to always keep the work area well-ventilated. Always wear rubber gloves to protect skin.

Things You'll Need

  • Scraper
  • Masking tape
  • Tube of silicone sealant
  • Utility knife
  • Caulk gun
  • Rubber gloves
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About the Author

Chris Varnell began writing professionally in 2010, with his work appearing primarily on eHow and Answerbag. He has worked in the construction industry for 10 years on projects ranging from high-rise construction to residential home building. Varnell graduated with a Bachelor of Science in construction science from Texas A&M University.