This specification describes the laboratory performance of materials for thin overlay treatments using a binder resin system and aggregates for concrete surfaces. The application of the thin overlay is comprised of a minimum of two layers of a binder resin system and surface-applied aggregate. Use of the thin overlay in a double lift application (binder resin system and aggregate) for above grade horizontal concrete surfaces (such as bridges, ramps, overpasses, directional flyovers, stacked interchanges, and viaducts) is recommended. Binder resin systems include low modulus epoxy, methyl methacrylate (MMA), and polyester resins.