Masterseal Crystalline Waterproofing 501

MasterSeal 501 is a crystalline waterproofing admixture and surface-applied capillary system that seals concrete by forming insoluble crystals in its pores, providing permanent protection against water ingress and corrosive agents. It is reactivated by contact with water to continuously seal, and it protects both the concrete and the reinforcing steel. MasterSeal 501 is now sold under the brand name SikaTop 501 Seal.