ostik Fire Cement (Formerly Cementone Fire Cement) Is Manufactured Using Only The Finest Quality Materials. It is a ready-mixed asbestos-free blend of inorganic fillers and water based thermo-setting resins, which dries cement like when exposed to heat and is suitable for all domestic applications. Bostik Fire Cement is tested up to 1250øC and has excellent adhesion to refractory brickwork and clayware. Bostik Fire Cement is suitable for repairs to a wide range of applications where heat resistance is required, including, fire backs, internal flue pipes, solid fuel heaters, boilers and other surfaces which may be exposed to extreme heat.