Ponds are aesthetically pleasing attributes of any environment. During construction, waterproof pond liners made of ethylene propylene diene monomer (EPDM) rubber or polythene are used when a custom pond shape is desired. Depending on the size of your pond, it might be necessary to join two or more sheets of liner together. These seams must be waterproof to prevent leakage. Sealing a pond liner is also necessary if the existing liner is punctured.
- Skill level:
- Moderately Challenging
Things you need
- Splice/seam tape roll
- Liner repair tape roll
- Absorbent towel
- Clean water
- Rolling tool
Lay a flat board on the ground and place the two pieces of liner to join on top of the board. This will provide a solid surface for optimal sealing.
Overlap the seams according to the width of the splice/seam tape you purchased. Most tapes are 3 inches wide, so the edges of the liners would need to overlap 3 inches.
Clean the sections to be joined with clean water. Dry thoroughly with an absorbent towel. The liner must be completely dry before you can seal the seam.
Cut a piece from the roll of splice/seam tape to the desired length for the seal.
Remove the backing on one side of the tape to expose the adhesive. Apply it to the top side of one of the pieces of liner. Rub firmly to make sure all the surface area of the tape affixes to the liner.
Remove the strip covering the adhesive on the top side of the tape that is already joined to the liner. Carefully lay the liner on top of the tap and press firmly.
Use a rolling tool to apply rolling pressure on the seam. This will ensure that all areas of the tape are in full contact with the liner. If you don't have a rolling tool, other rolling devices that can be used include rolling pins and soup cans---anything that will provide constant rolling pressure.
Drain the pond to a level where the puncture can be reached.
Cut a patch from a liner repair tape roll. Make sure it is large enough to cover the hole with a minimum of 1 inch overlap on each side.
Remove the backing on the repair patch to expose the adhesive.
Place the patch, adhesive side down, on top of the hole. Press and rub firmly to affix the patch to the liner. Pay close attention to the edges to make sure they adhere. If you are able to, use a rolling tool to apply constant rolling pressure to the patch.
Sealing a Puncture
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