Medici Polyurea Colour Coating System transforms a concrete surface to a multicolor finish that simulates marble, slate, or any natural stone. Suitable for both interiors and exteriors, the system uses a polyurea coating and provides 100% UV stability. Due to unlimited pot life, installers have time to create the desired look using sponge rollers and foam brushes. The product is rated with cure times that allow foot traffic in four to eight hours and vehicle traffic within 24 hours. Citadel Floor Finishing Systems. 866-765-4474.