GIRtech Refractory Cement Dry Mix Mortar 10 LB 3110 Degree °F High Temp Heat Resistant Mortar for Repairing & Masonry, Fire Brick Lining Fire Pit, Fireplace, Kiln, Furnace, Forge

GIRtech CONTACT DRYMIX is a high-quality refractory mortar specially designed for masonry and fire brick lining in heating appliances like fireplaces, stoves, fireboxes, and ovens. The dry mix is easy to prepare—simply add water—and provides excellent adhesion when applied between bricks. It delivers long-term strength under extreme heat conditions, tolerating temperatures up to 3000°F (1648°C). Unlike traditional cement or gypsum mortars, this product requires firing to reach full durability and strength. Allow the masonry to dry for 48 hours at room temperature (64–72°F) before gradually increasing the heat to avoid cracking. Small cracks may appear during heat treatment—this is a natural process and does not compromise the structure. Ideal for indoor and outdoor use, GIRtech DRYMIX is made from non-toxic, natural materials. Ensure the structure is protected from rain or snow during the drying process. Follow all usage instructions to guarantee optimal performance and safe operation of your heating unit.