Dri-Dek 3'x4' Interlocking Sheet (Gray) - Patio, Lanai & Pool Deck Flooring Dri-Dek Tiles, Sheets & Rolls just snap together to make a surface of any size or shape. Flexible, Durable, Easy to Install, Trims to Fit. Built-in Anti-Microbial Agents Fight Mold and Mildew. The patented self-draining surface is perfect for wet areas. Dri-Dek has served over 1,000,000 happy customers since 1977.