Heat Resistance: 750°C This heat-resistant gypsum is for non-ferrous metal molds and can be used for zinc alloys, aluminum alloys, copper alloys, and glass casting. Physical Properties (Manufacturer's Announcement) Mixing Water: (per 1kg of powder) 47-49% Mixing Time: 6 minutes Setting Time: 40-55 minutes Tensile Strength: 0.7MPA or more Setting Expansion Rate: 0.12% or less Instructions, etc., are not originally included. Note 1: However, the above are only guidelines. They may vary depending on temperature, humidity, storage conditions of the gypsum after opening, and mixing method. Note 2: When dissolving the gypsum, always add the gypsum to the water. Adding water to the gypsum may cause lumps (partial clumps) depending on the amount, which may lead to poor hardening. Gypsum is susceptible to moisture. We cannot accept refunds or returns due to factors such as the customer's management environment after opening or operational errors. Please understand.