Shrinkage cracks are caused by multiple issues which is why PREVent-C works in multiple ways to stop them. The effectiveness of magnesia-based PREVent-C is achieved by combining two widely-used technologies. By blending expansive components with pore water surface tension reduction, you can successfully defend against both autogeneous and drying shrinkage cracks. The result is less repair work, less headaches, less liability along with an improved construction sequence, improved durability, and better defense against ingress of water and chemicals.