How to Seal a Kitchen Sink for Long-Lasting Results
Between washing dishes, prepping food and cleaning, your kitchen sink has to stand up to a lot of daily wear and tear. That’s why it’s particularly important for your sink to have a durable, watertight seal. Old, damaged sealant or a sealant that isn’t 100% waterproof can let water and moisture seep between your sink and counters, which can create leaks in your cabinets or lead to problems like mold, mildew and rot. Knowing how to seal a kitchen sink properly with a 100% silicone sealant will prevent these problems before they start.
Tools & Supplies for Sealing Sinks
Picking the right sealant can make all the difference. For sealing a kitchen sink, or anywhere water could be present, choose a GE-branded 100% silicone sealant, like GE Tub & Tile Silicone 1 ® sealant. This sealant is 100% waterproof, permanently flexible and has 7-year mold-free product protection, 1 so you can create a lasting, mold-resistant and watertight seal.
Whichever product you choose, check the packaging to ensure the sealant will adhere to your countertop material without staining it.
Pro Tip: 100% silicone sealants are not paintable so be sure to pick the appropriate color for your project.
Besides a GE-branded 100% silicone sealant, you will also need:
- Caulk gun
- Painter’s tape
- Latex gloves
- Soapy water
- Paper towels
- Utility blade
- Caulk tool
- Mineral spirits
- Isopropyl alcohol
With all your tools and supplies ready, follow these steps to learn how to seal a kitchen sink so it has long-lasting, 100% waterproof protection:
Start with a Clean Surface
Apply Painter’s Tape
Carefully Cut the Sealant Cartridge
Apply Sealant
Tool the Bead & Remove the Painter’s Tape
Let Sealant Cure Completely
1 Cured sealant is resistant to stain causing mold and mildew. Regular cleaning of the cured sealant is required, however, as soap and other residue can cause secondary mold and mildew growth.
2 Exposure to water possible in as little as 12 hours with bead size max 3/16″, temperature min 65°F and humidity min 50%. Do not touch or clean sealant for 24 hours.
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