... . Waterproof. Solvent-free glue, zero water-absorption & click system over 4 sides keeps its complete watertightness.2. Environmental protection ... .4. DIY installation. East-to-install for its click system and no use of glue, nails and special tools. ... proofing, worm-preventing, anti-corrosion, high temperation resistance, high-precision click system, etc. Technical Specifications:Thickness:4.0mm , 5.0 ...