The heat-resistant mortar is used to bind refractory brick together. It can be used with insulating or fire brick. Different formulas are available for the specific application. Our mortars have a classification range of 2,850° to 3,300°, guaranteeing you the correct mortar for your application. Our mortars can be used with insulating firebrick, low duty firebrick, medium duty firebrick, high duty firebrick, and super duty firebrick. Give us a call today for a quote on the correct mortar for you.