12OZ BLK Foam Sealant

12 OZ, Anjon Black Straw Waterfall Foam Sealant. Prevents Your Waterfall & Stream From Disappearing Beneath Rocks & Stones, Seals Gaps & Fills Voids Between Streambed & Waterfall Rocks & Stones, Stabilizes Rockwork In Koi Ponds, Water Gardens & Pond Less Waterfall, Moving Water Travels Over, Not Under, Rocks & Stones For Dramatic Visual Effect, Fish, Aquatic Plant & Wildlife Safe.