DanSB
Avid Member
I've seen where people use it for waterproofing wooden planter boxes on rooftop gardens and growing food in the planters. The membrane referenced is also EPDM sheet. Quite a few people use that. I think the liquid will seal better because it soaks in and bonds to the substrate. No staples or glue to hold it in place like the membrane.
I use it to line the inside of rocket motors as thermal insulation. Versatile stuff.
I just did a google search, liquid EPDM is used commonly for bonding pond liners and is considered fish safe... I would suppose if it is safe for fish there should be 0 issues. I will be using this on my next project thanks for the tip!