6″ Wide Seam Cover Tape for EPDM Liner The 6″ One-Sided Cover Tape is used by pond professionals to seam multiple pieces of EPDM Liner together. We recommend using our Aquascape Tape Primer (sold separately on Amazon.com) to clean and prepare all surfaces before using the Seam & Cover Tape. For a more secure waterproof seam, use the 3″ Two-Sided Seam Tape first, and then put down the 6″ Cover Tape to seal the top seam. Both tapes are available in custom lengths or pre-cut 5′ lengths. The 6″ Cover Tape can also be use for patching holes in EPDM liner. Just dry the area around the hole, apply primer, let dry, then apply a piece of Cover Tape over the hole & press firmly. Hole is now patched!