Leave to fully harden for 24 hours, this is a brilliant filling, bonding and insulating material. To use always use protective gloves, shake the can well, screw the can into the gun applicator (sold seperatley). Hold can upside down and press valve. Bonds quickly to porous or non-porous rock, stone, cement, wood or cloth. Black colour. Mildew & water resistant, high thermal and acoustic insulation value. Efficiency up to 45 liters depending on humidity and temperature. Contains Fire retardant. Excellent bonding and filling properties. Developed for pond and waterfall applications. Suitable for filling and sealing gaps in large cracks and holes. Helps direct waterflow over rocks, not under. APPLICATOR NOT INCLUDED WITH PRODUCT.