Is the water in your waterfall flowing under the rocks where you can't see it? Waterfall Foam is the answer. Use Atlantic FallsFoam waterfall foam to hold the rocks in place and seal the spillway rocks along the bottom and sides so water will flow over the rocks on the spillway. This is a 12 oz can. Sprays into place just like expandable foam insulation.How much waterfall foam do you need? Well, that can be tough to gauge. As a very rough guide this can will provide a 1/2" bead that is 499' in length.
Please Note: This item ships only by UPS Ground. Expedited shipping is not available.