Unisorb Concrete Repair Compound (URCR) is designed for use in making fast repairs of concrete floors, aisle ways and drives. It is also excellent for patching and filling chuck holes and for quick setting of anchors. Depending on the application, repairs made with UCRC can be used in as little as one hour. After a three hour cure it is as good as most concrete floors (3900 psi compression) UCRC is self-sealing and requires no sealant when used out doors, unlike most cementitious products.