A small tear in a vinyl pool liner doesn’t mean you need a new liner. Underwater patch kits seal pinholes, slits, and small tears effectively — and the patch lasts for years if applied correctly. Here’s how to patch a vinyl liner without draining the pool.
What you can and can’t patch
Patchable:
- Pinholes (less than 1/8″)
- Slits up to 2″ long
- Small tears in the floor or lower wall
- Holes around fittings (skimmer, return jet, light) if the surrounding vinyl is sound
NOT patchable — replace the liner:
- Tears longer than 2″
- Cracks at seams (the bonded seam itself is failing)
- Brittle, faded vinyl that crumbles when touched
- Tears with vinyl stretched out of shape on the edges
What you’ll need
- A vinyl pool liner patch kit (clear vinyl + underwater adhesive)
- Scissors
- A clean cloth or towel
- Swim goggles if patching underwater
Step-by-step
Water needs to be still and you don’t want suction pulling on the patch as it sets.
Use the dye test if you haven’t already found the exact spot. Mark with painter’s tape on the deck directly above so you can find the spot underwater easily.
Trim to a rounded shape (oval or circle) at least 1″ larger than the tear on every side. Sharp corners on patches lift over time.
Read the patch kit’s instructions. Most underwater adhesives are applied as a thin layer to one side of the patch immediately before placing.
Apply firm pressure for 30–60 seconds. Work from the center outward to push out trapped water and air bubbles. Make sure all edges are sealed.
Most underwater patches need 5–10 minutes of hold time before they’ll bond. Don’t let water flow against the patch during this time.
The adhesive cures slower underwater than in air. Give it time.
Supplies that help with liner repair
Pentair Clearview Vinyl Liner Vac
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GLI Replacement Liner (when patch isn’t enough)
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Taylor K-2006 Test Kit
Shop NowMultiple patches on the same liner usually mean it’s time for a full replacement. See our liner selection guide.