Waterproof. Strengthens joints and allows some movement between substrates. For use with Mapei Shower Waterproofing Kit and Aquadefense (both available separately). 5m x 120mm Waterproof Odourless & Solvent-Free Elastic & Malleable Even at Low Temperatures Waterproofing Adjacent Walls & Floors For Use with Mapelastic Aquadefense 5m x 120mm Waterproof Odourless & Solvent-Free Elastic & Malleable Even at Low Temperatures Waterproofing Adjacent Walls & Floors For Use with Mapelastic Aquadefense