Use no thicker than 1/4″ when apply to cure properly, ideal cure temp is 60° to 80°F for up to 24 hours. Will adhere to metal (even aluminum)- scuff metal surface and clean well with Lacquer thinner before application. Clean up excess using damp cloth before it dries, can use a little water if dried out in tub. Can set a ‘small’ fire to help set cure *BUT* not to hot or can boil water out of formula, causing holes and cracks that will compromise the application, paint-able once fully cured. Interior use only, product is water soluble, not flexible (dries hard cement) this can cause cracking on stove pipes that expand and contract with heat, use a silicone sealant or direct vent sealant depending on temp in these cases, If you need a higher temp rating use Refractory cement. color may whiten when heated. Not an adhesive and is water soluble. if need to adhere firebricks to cinder block use Castable Refractory Cement instead.
Multi Purpose cements for bonding and sealing both masonry and metals with working temp up to 2000°F, designed for patching, repairing cracked and chipped firebrick and mortar, effective in resetting and cementing furnaces, stoves, chimney collars, boilers and duct work.