"Phyllis and Jim" wrote in message
...
EDPM flexes and would be likely to pull away. We have used
compression and EDPM roofing glue to ensure a tight connection.
Alternatively, perhaps it could flow out of the preform and land in an
EDPM pool or land on a slope at the top of the stream (No splash).

2 cents worth of ideas for free

Jim

Well, the lip on the preformed pond is only 2 inches or so.. not sure if I
trust the waterflow rate to spill out of it without something actually
extending it.

Reason I asked about great stuff, was that I had it connecting a few rocks
together we just removed for the new work.. great stuff is actually holding
a 20 lb or more flagstone rock by it's edge, without budging an inch! I knew
it was sticky, and would stick to anything, but I never dreamed it had that
kind of strength!

I could probably build a great stuff spillway just below the lip, since I
know it'll stick to the preformed pond. I'll just fold the epdm as high as I
can under the lip, and hope it catches all the down spill.

I'll take some pics when things are along more... but today it was over 90
and full sun out there by 1pm, and I just wanted to stay indoors in the air
conditioning!

Gareee