Manufacturer of Phoscrete Concrete Repair Materials Phoscrete is a Magnesium Phosphate Cemennt (MPC) rapid set concrete that bonds strong to repair damaged concrete and is traffic-ready in 30 minutes. Phoscrete stops rust without shot-blasting or primers. Phoscrete accepts joint and deck sealants one hour after placement. Wow, all these features plus a 15-year documented history of successful installations, too! Phoscrete is easy-to-use, long-lasting, and contains no VOC’s and no respirable silica. Phoscrete is an excellent choice for repairs all year long, even in sub-freezing temperatures. Phoscrete is perfect for Expansion Joint Repair and cold weather concreting.