Advanced Haze Free Technology Can be used for joints up to a maximum of 1 inch (2.5 cm) ASTM C-144 fine gradation allows use in even the tightest joints OSHA silica crystalline compliant (OSHA 29 CFR 1926.115 Helps prevent erosion due to wind, rain, and freeze thaw cycles For Drainage application, rain safe 1 hour after water activation. Works above 32°F (0°C). Waterproof Bag Can be laid flat and stored outdoors. (Lay bag flat on its back, so front of the bag is facing you.) Pallets can be stored outside