TIERRA INNOVATIONS ROCKIN FOAM is a maximum yield/minimal expanding black foam WITH CARBON. Maximize yield and control with the patented all directional dispensing system and the newly designed trigger with storage nub. Rockin foam is specifically designed for water gardening applications. Minimal expanding foam for secure rock placement and design. 20 oz. can dispenses at any angle and is tack free in 30 minutes. Foam may be trimmed, sanded, caulked or plastered in 1 hour. Rockin Foam is water resistant and safe for aquatic plants and animals.