## How to Seal a New Kitchen Sink
### Materials You’ll Need
* Plumber’s putty or silicone caulk
* Putty knife or caulk gun
* Clean cloths
* Rubbing alcohol or mineral spirits
* Masking tape (optional)
* Utility knife (optional)
### Step 1: Prepare the Sink and Countertop
1. Clean the sink and countertop thoroughly with rubbing alcohol or mineral spirits to remove any dirt, grease, or debris. This will help the sealant adhere properly.
2. Dry the sink and countertop completely with a clean cloth.
### Step 2: Apply Plumber’s Putty (if using)
1. Roll out a rope of plumber’s putty about 1/4 inch thick and 1/2 inch wide.
2. Place the putty around the base of the sink flange, forming a continuous bead.
3. Press the putty firmly into place using your fingers or a putty knife.
### Step 3: Apply Silicone Caulk (if using)
1. Cut the tip of the silicone caulk tube at an angle.
2. Insert the tube into a caulk gun.
3. Apply a bead of silicone caulk around the base of the sink flange, overlapping the plumber’s putty (if used).
4. Smooth the caulk using your finger or a putty knife.
### Step 4: Remove Excess Caulk (if using)
1. Wipe away any excess caulk from the sink and countertop using a clean cloth.
2. If the caulk has already cured, you can use a utility knife to carefully scrape it away.
### Step 5: Let the Sealant Cure
1. Allow the sealant to cure completely according to the manufacturer’s instructions.
2. This typically takes 24-48 hours.
### Tips
* For best results, use a high-quality sealant that is specifically designed for sealing kitchen sinks.
* If you are using plumber’s putty, be sure to press it into place firmly to create a watertight seal.
* If you are using silicone caulk, be sure to smooth it out evenly to prevent any gaps or air pockets.
* If you are sealing a sink that has been installed for a while, you may need to remove the old sealant before applying new sealant.
* You can use masking tape to create clean lines when applying sealant. Simply apply the tape around the base of the sink flange, apply the sealant, and then remove the tape before the sealant cures.
### Troubleshooting
* **If the sink leaks after sealing, it is likely that the sealant was not applied correctly.** Remove the sealant and reapply it following the steps outlined above.
* **If the sealant is cracking or peeling, it may be due to poor adhesion.** Clean the surface of the sink and countertop thoroughly and reapply the sealant.
* **If the sealant is discolored, it may be due to exposure to harsh chemicals or UV light.** Replace the sealant with a new one that is resistant to these elements.