Once production of the GFRC part is complete, it is recommended to cover the part in plastic for 12-16 hours during initial cure at a minimum temperature of 60⁰ F.  This prevents excessive evaporation of hydration water in hot, dry climates while polymer film forming takes place, ensuring a proper cure.  It also helps to maintain the heat of hydration, known to accelerate initial strength gain.  In colder climates, blankets and indirect heat can be used to ensure strength gain allowing demolding in 12-16 hours.  GFRC should never be directly exposed to forced air heat or fans, which will result in craze cracking and drying shrinkage cracks.  After demolding, GFRC containing Forton® VF-774 can be air cured.