what do you think? anyone use this before? it's from
http://www.pondtechnology.com/pages/butyl.html I think it's great. no corner folding is needed. don't know how much it cost though.
Steve
30 MIL AND 40 MIL BUTYL CUSTOM THREE-DIMENSIONAL LINERS: Where folds are not acceptable, such as for formal reflecting ponds, we can fabricate three-dimensional rectangular liners with vulcanized corners. We can also fabricate three-dimensional L-shapes and cylinders, but these can be very expensive and may require long lead times. The walls of the pond must be accurately formed of wood, masonry, or concrete: three-dimensional liners cannot be used with soil or stone walls.If the liner is to be wrapped over the top of the pond walls, order the liner at least six inches taller than the pond. Cut four small round holes corresponding to the top corners of the pond walls as shown. Then slit the corners to make four side flaps.
When the flaps are folded over the rim of the pond, there is a notch at each corner where there is no rubber. This can be filled in with a small square of uncured repair tape. Clean the rubber with our cleaner/primer or with naptha, position the tape so that it hangs over the pond two inches, and form the tape downward into the corner (the tape is stretchable).
A three-dimensional rectangular can also be fastened directly to the wall of the pond. Mark a line approximately one-quarter inch above the planned water level. Cut and fasten our black termination bars just below the line using the screws provided (if fastening to masonry, use plastic inserts). Mark the ends of the bars and remove them. Clean the wall and apply our termination bar tape below the line but leave the release tape in place. Position the liner, making certain that it extends completely into the bottom corners of the pond so that it will not stretch when the pond is filled with water. Then remove the release paper and carefully press the liner into the tape. Finally, re-attach the termination bars.
Wall termination bar (right) clamps rubber to wall through termination bar tape (left)