Gboard MR H3 is a moisture resistant board with silicon oil in the core having an average percentage, between 10 and 25 %, of water absorption. The oil acts as a water repellent rendering the core more resistant to moisture. Gboard�® MR H3 is the perfect suit for areas of high humidity. Gboar MR H3 is composed of the best quality gypsum, non-toxic minerals, and moisture repellent additives which suit health conditions. All materials are certiï¬?ed based on ASTM and EN standards and tested in approved laboratories. Advantages The perfect suit for humid areas Moisture resistant board with a percentage of water absorption between 10 to 25% Convenient backer for showers and bath areas Surface Finishing Multiple finishing options: Painted (Water or oil bas paint) Wallpaper, vinyl,woodâ?¦ Joint fillingWith Gcoatâ?¢All Purpose Joint Compound Edge Types Squared edge Tapered Edge Standards ASTM C 1396 ASTM C473 ASTM C518 EN 520 Dimensions Width: 1200mm, 1220mm Length: 2000mm, 2400mm, 2440mm, 2500mm, 3000mm Thickness: 8mm, 9.5mm, 12.5mm, 15mm, 15.9mm, 18mm