Five Star Structural Concrete HTR is a unique high temperature resistant concrete repair material which can be pumped or poured into place. Five Star Structural Concrete HTR gains strength rapidly and can be exposed to 1000°F (538°C) in three hours and up to 2400°F (1316°C) after a 7-day curing procedure. Advantages Thermal shock resistant Resistant to sulfates High temperature resistance High early strengths Coarse Aggregate Extension up to 100% Uses Areas of high temperature exposure Rapid repairs during shutdowns Thermal cycling up to 2400°F (1316°C) Coker, kiln and foundry repairs