How To Seal A New Bathroom Sink Drain

Installing a new bathroom sink can be a great way to update your bathroom and give it a fresh new look. However, if the drain is not properly sealed, it could leak and cause damage to your bathroom. Here are the essential aspects of how to seal a new bathroom sink drain:

1. Materials You'll Need:

Plumber's putty
Putty knife
Flashlight
Adjustable wrench
Silicone sealant
Caulk gun

2. Prepare the Drain:

Start by cleaning the drain flange and the underside of the sink using a damp cloth. This will remove any dirt or debris that could prevent the seal from forming properly.

3. Apply Plumber's Putty:

Roll out a rope of plumber's putty and place it around the base of the drain flange. Use your putty knife to smooth it out and create an even seal.

4. Install the Drain Assembly:

Place the drain assembly into the drain hole and tighten the nuts until it is snug. Do not overtighten, as this could crack the sink.

5. Inspect the Seal:

Use a flashlight to inspect the seal between the drain flange and the sink. If you see any gaps, apply additional plumber's putty or tighten the nuts.

6. Apply Silicone Sealant:

Run a bead of silicone sealant around the outside of the drain flange. Use your finger or a caulk tool to smooth it out and create a watertight seal.

7. Let the Seal Cure:

Allow the silicone sealant to cure for the amount of time specified on the package. This will typically take several hours.

Tips:

Always follow the manufacturer's instructions for the silicone sealant you are using.
Do not use excessive force when tightening the drain nuts.
If you are not comfortable sealing the drain yourself, contact a licensed plumber.