Plastic refractories are firebricks in plastic putty-like form which can be installed by ramming the plastics with a wooden hammer or air rammer into any shapes required. After installation, it is baked with operation temperature of the furnace itself (over 1,000°C) to form the tough walls. Castables are refractory cements which are mixed with the proper amount of water for installation. May be poured into frames or trowelled as is the case with ordinary cement. After installation by whichever method, it hardens to a sufficient strength. From among various types of products, the most common products are listed below. THERVEK PAT(Patching) - Plastic refractories Patching repair material with superior adhesive properties. These refractories are affixed firmly to the repair area by the strong adhesive power of phosphate. After heating, patching refractories display extremely strong adhesive strength in their adhesion to the base material. Patching in this way enables you to prolong the service life of your refractories by performing easy repairs.