Gosh, I can't remember, but it's really Great Stuff!
Tim

P.S. It literally sticks to *everything*, wear gloves and old clothes that
you wouldn't mind throwing away...

"K30a" wrote in message
...
For waterfalls,
Most folks use that black expanding foam,
put rocks down in the waterfall, fill in gaps
with smaller rocks.
What is that stuff called?


k30a