The DIY Atlantic Water Gardens 12oz black waterfall foam works great for homeowner installations.
It is used for filling in unwanted voids, and also sealing joints while building your waterfall. This helps water to run over the rocks and not under it.
Can also be used to repair rock walls, or replace loose or damaged mortar
One 12oz FallsFoam can can usually can be used for a average waterfall thats 3' tall and 2' wide.
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