This is a ready mixed, ready to use, finely ground putty substance which dries rock hard when exposed to heat. Fire cement is ideal for patching and repairs to firebricks, fireplaces, grates, stoves, flues solid fuel ovens ranges and boilers. Not to be used in permanent contact with water. Contains no asbestos. Fire cement is tested to 1250C, well in excess of any other domestic applications. Stovax Fire stove cement is one of the best selling stove cements. Please read the Manufacturers instructions before use.