KAST-O-LITE 30 LI Plus is a high alumina, lightweight, 3000°F maximum service temperature, insulating castable Sold in 5-lb and 10-lb packs. Larger packs available upon request. Following Brian's Apollo Forge plans, use this pre-measured refractory to cast your own ribbon burner and forge doors. You can also use our 3D print files to print molds for Launch Pad forge floor liners, heat treating Hot Racks, and Forge Rubble HEALTH HAZARDThis product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which is known to the State of California to cause cancer. Please handle all raw materials with safety in mind. These raw materials can expose you to hazards when not handled properly. When handling and mixing this or any dry ceramic materials and powders, wear all of the following PPE: a full breathing respirator eye protection gloves