Ceratech Mainline is the first-of-its-kind, high performance, rapid setting, new construction and repair concrete. Mainline is an environmentally-friendly, highly green-sustainable, non-Portland, non-epoxy construction material. It comes in pre-extended, 66 lbs. bags and is mixed and placed like traditional cement. Mainline is specifically designed for horizontal applications, has a applicable temperature range of 30 to 120 degrees F, resistance to freeze-thaw cycles, 60 minutes of working times, and will reach compressive strengths over 2,000 psi within 4 hours from addition of water.