Gator;2803112; said:

I've heard of Snow seal as many times as I've heard of Kool Seal... Zero.
and No one here has ever mentioned the two products before so dont get all high and mighty on me for telling someone not to use a
cheap roof coating for fish.
KLee79 again I wouldnt use that stuff for anything to do with fish. it might resist water but its not made to be constantly submerged in water so use it at your own risk. If you cant afford epoxy then use Drylock, that IS a product many people have used with success.
Guess again...
I have commented several time on the kool seal product.
THey have changed there formula or found a way around the ponding problem now.
But lets remember..Ponding is a 24hr type of instance and not continuous.
63300, 63320, 63325, 63600 when used with kool-lastic primer is recommended for ponding water. There is no mention of total and constant immersion in water.
Ames
Super Elasto-Barrier is recommended for extreme wet situations such as ponding water.
Snow Seal® is potable water compliant.
Ames'® Iron Coat is potable water compliant.
Ames' Block & Wall Liquid Rubber will withstand up to 100 P.S.I. water pressures. Is
relatively non-toxic to the environment.
http://www.amesresearch.com/images/boat/index.htm
Blue Max is impervious to water when applied in a uniform and seamless fashion with adequate millage. It can be used as a potable water coating. (I've commented on this one too.)
Drylock is a
masonary waterproofer.
Note: none of these are to be used directly on wood.
Epoxy and pin holes...Let cure and wet sand with 600 grit w/d sandpaper, clean and dry completely, then re-coat (if re-coating a third time wet sand second coat).
Some epoxies will 'blush' when submerged for extended periods of time.
There are no "cheap" ways of waterproofing a tank / pond or this question would never have to be asked.
Dr Joe
.