Leaky Sink Edges? Here’s the Simple Fix You Can Do Today
A sink that leaks around the edges can turn into a bigger problem if you ignore it. Water can seep into the counter, loosen the seal, and even damage cabinets below. The good news is that most edge leaks are fixable without calling a plumber.
In this guide, you’ll learn what causes the leak and how to fix it using basic tools and simple steps.
Why Your Sink Is Leaking Around the Edges
Most edge leaks happen because the seal between the sink and the counter has failed. Over time, this seal can wear out due to:
- Old or cracked caulk or sealant
- Loose sink clips or mounting brackets
- Movement from heavy use
- Water buildup under the rim
Once the seal breaks, water starts slipping through the gap every time you use the sink.
Tools You’ll Need
Before starting, gather these items:
- A putty knife or scraper
- Rubbing alcohol or mild cleaner
- Clean cloth or paper towels
- Waterproof silicone caulk
- Caulk gun (if needed)
- Screwdriver (for tightening clips)
Step-by-Step: How to Fix a Leaking Sink Edge
1. Clear and Dry the Area
Turn off the water supply if needed and remove everything from under the sink. Wipe the area dry so you can clearly see where the leak is coming from.
2. Remove Old Sealant
Use a putty knife to carefully scrape away the old caulk or sealant around the sink edge. Take your time here. Any leftover bits can stop the new seal from sticking properly.
3. Clean the Surface
Wipe the area with rubbing alcohol or a mild cleaner. This removes grease and dirt so the new seal bonds well. Let it dry fully before moving on.
4. Check the Sink Fit
Gently press around the sink edges. If it moves, the mounting clips underneath may be loose. Tighten them with a screwdriver. This helps keep the sink stable before resealing.
5. Apply New Sealant
Load the silicone caulk into a caulk gun. Apply a steady bead around the sink edge where it meets the counter. Try to keep the line smooth and even.
If you don’t have a caulk gun, squeeze carefully from the tube and go slow.
6. Smooth the Seal
Use a damp finger or a smoothing tool to press the caulk into the gap. This helps create a tight seal and removes excess.
7. Let It Cure
Let the seal dry for at least 24 hours. Avoid using the sink during this time so the seal can set properly.
Common Mistakes to Avoid
- Skipping cleaning before applying new caulk
- Using too much sealant
- Not letting it fully dry
- Ignoring loose mounting clips
These small mistakes can cause the leak to come back quickly.
When to Call a Professional
If the sink still leaks after resealing, the problem may be deeper. You may have:
- A cracked sink basin
- Damage under the countertop
- Plumbing issues under the sink
At that point, getting help from a plumber can save you time and prevent further damage.
Final Thoughts
Fixing a sink that leaks around the edges is usually a simple repair. In most cases, replacing the old sealant and tightening the sink is enough to stop the problem.
With a little time and care, you can protect your counter, cabinets, and plumbing from water damage and keep your sink working like it should.