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 — Open-Box, 17% Off

🔥 HIGH-TEMPERATURE RESISTANT REFRACTORY MIX: GIRtech CONTACT DRYMIX is a professional-grade refractory mortar designed for masonry and lining of fireplaces, stoves, fireboxes, ovens, and heating units. Withstands extreme temperatures up to 3000°F (1648°C), providing long-lasting performance and structural integrity in high-heat environments.

🧱 EASY TO USE – JUST ADD WATER: This dry powder mix is simple to prepare—just mix with water before application. For best results, wet bricks before use to improve adhesion. Ideal joint thickness is 0.11–0.15 inches (3–4 mm). Apply with a trowel for a smooth, even finish.

🔥 STRONG JOINTS THROUGH PROPER FIRING: Unlike cement-based mortars, this clay-based refractory mortar requires firing to develop strength. Let masonry dry at 64–72°F (18–22°C) for 48 hours before gradually igniting. Full sintering occurs at 2190°F, with minimum strength achieved at 750–1110°F (400–600°C).

⚠️ IMPORTANT USAGE INSTRUCTIONS: Avoid moisture and weather exposure during drying. Do not paint, plaster, or tile until the structure is fully dried and fired. Fine cracks may appear after drying—this is normal and does not affect structural integrity. For outdoor use, always protect the unit from rain and snow.

✅ SAFE, NON-TOXIC & FOOD GRADE: Made from natural materials, this mix is non-toxic and safe for use indoors and outdoors. However, avoid inhaling dry powder as it may irritate the respiratory system. If contact with eyes occurs, rinse immediately with clean water.

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.