Patch it yourself with an underwater repair kit

Patch it yourself with an underwater repair kit.

Yes, you can fix most small leaks in a vinyl liner without replacing the whole thing.

The trick is actually finding the leak. Grab a bottle of pool leak dye (or use food coloring if you’re cheap and careful). Turn off the pump, let the water settle, then squirt dye near suspected areas like seams, fittings, or wrinkles. Watch for dye getting sucked into a hole.

Once you find it, clean the area with a vinyl liner cleaner or rubbing alcohol. Cut a patch that overlaps the hole by at least an inch on all sides. Most underwater repair kits come with a two-part epoxy or a glue patch that cures underwater. Press it on firmly, smooth out air bubbles, and leave the pump off for 24 hours.

If the leak is at a seam or near a fitting, the patch may not hold long-term. In that case, a liner repair professional can often replace just the problematic section or use a vinyl weld, but you’re still better off than replacing the whole liner.

Don’t bother with duct tape or silicone caulk—they won’t bond to vinyl underwater. Use the right stuff or call someone who knows what they’re doing.