Unless it's over 5" thick it will pass water. You need to coat with either
cement + acrylic admixture or something like Thoroseal. Each is sold at Home
Depot.

Sam

"Gunnar" wrote in message
news:5C1Qa.3405$zd4.1087@lakeread02...
just made new waterfall made it with portland cement should this be coated
with anything before running. or sealed with a sealer of some kind?