Black Waterfall Foam 16 oz. - HydroFoam™

For Gluing Waterfall Rocks Together Black waterfall foam sealant for all types of pond and water feature construction needs Multi-purpose foam Durable, flexible Black/Charcoal color when cured Use to fill voids behind waterfall boulders Use to fill voids behind stream boulders Use to stabilize rock walls, submerged, and non-submerged Use to "glue" concrete retaining wall caps to concrete wall blocks Bonds boulders to boulders Bonds boulders to all types of liners - rubber, concrete, polyurea 60% expansion - fill voids with 40% foam, the foam will expand to fill the remaining 60% void Dries tack-free in 20 minutes - cures in 24 hours Density: 1.4-1.6 lbs/cu. ft. Compression: 10-14 PSI