How To Seal Bathroom Sink Drain

A leaky bathroom sink drain can be a major annoyance, and it can also lead to water damage if not fixed promptly. Fortunately, sealing a bathroom sink drain is a relatively simple task that can be completed in a few minutes with the right tools and materials.

The first step is to identify the source of the leak. If water is leaking from the base of the drain, the problem is likely with the drain washer. If water is leaking from the top of the drain, the problem is likely with the drain flange.

Once you have identified the source of the leak, you can begin to seal the drain.

To seal a leaky drain washer:

Turn off the water supply to the sink.
Loosen the drain nut using a wrench.
Remove the drain washer from the drain.
Apply a bead of silicone sealant to the new drain washer.
Place the new drain washer on the drain.
Tighten the drain nut.
Turn on the water supply and check for leaks.

To seal a leaky drain flange:

Turn off the water supply to the sink.
Remove the drain strainer.
Apply a bead of silicone sealant around the base of the drain flange.
Replace the drain strainer.
Turn on the water supply and check for leaks.

If you are still having problems with a leaky bathroom sink drain, you may need to call a plumber for assistance.

Additional tips for sealing a bathroom sink drain:

Use a high-quality silicone sealant.
Make sure the surfaces are clean and dry before applying the sealant.
Allow the sealant to cure completely before using the sink.
If you are not comfortable working on plumbing fixtures, it is best to call a plumber for assistance.