No. F-370 Hydroactive Polyurethane Grout by Sauereisen

No. F-370 by Sauereisen is a catalysed hydrophobic grout that reacts with moisture and expands to 20 times its volume to seal leaks, cracks, joints and voids. It bonds tenaciously to practically any substrate, wet or dry, has excellent chemical resistance and is safe for potable water.