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HydroBlok boards are constructed of high-density extruded polystyrene (XPS) closed cell foam. This is laminated both sides with a cementitous coating embedded with fiberglass mesh, creating a rigid, waterproof, mold-resistant building panel.

Yes. HydroBlok boards are inherently mold- and mildew- resistant due to their waterproof XPS foam core and non-organic surface coatings. this makes them ideal for high-moisture areas like showers and wet rooms.

HydroBlok boards have a 40.5 PSI compression rating and are engineered to resist damage during handling and installation. the fiberglass mesh and cementitious coating enhance surface durability and impact resistance.

You can watertest immediately after applying HydroBlok sealant, as it is moisture cured. Tiling can begin as soon as the sealant becomes dry to the touch (typically within 45 minutes), although thicker applications may require more time to cure.

Yes. HydroBlok offers Low-Profile and Single-Slope shower pans specifically designed for curbless installations. When installed flush with the surrounding floor and combined with a linear drain, these pans create seamless walk-in showers that meet accessibility guidelines and offer a sleek modern look.