Abstract: A flexible liner is formed from a resilient material and includes a back side surface having a number of outwardly projecting members that extend a distance away from the liner. The flexible liner is in sheet form for rehabilitating surface sections, and is not in the form of a tube to cover an entire surface diameter. The outwardly projecting members each have a head enlarged profile configured to provide a strong mechanical lock with a carrier that is injected within an annular space disposed between the liner back side surface and the underlying substrate surface in need of surfacing or rehabilitation. The liner is positioned adjacent the structure surface by use of a collapsible, expandable form, and a carrier is injected within the annular space disposed therebetween so that the liner outwardly projecting members are completely enveloped by the carrier. The carrier is cured to form a mechanical lock between the outwardly projecting members and the carrier.

Abstract: A flexible liner is formed from a resilient material and includes a back side surface having a number of ribs that project outwardly a distance away from the liner. The ribs each have an enlarged profile configured to provide a strong mechanical lock with an intermediate adhesion layer or carrier that is applied to a surface portion of the underlying substrate needing surfacing or rehabilitation. The liner is installed to surface or rehabilitate a structure by applying a thickness of the carrier to the wall section of the underlying substrate, positioning a back side surface of the liner adjacent the carrier, pressing the liner against the carrier so that the ribs are inserted and completely covered by the carrier, and forming a mechanical lock between the ribs and the carrier. The carrier is formed from a resinous material that has good adhesion properties and that displays good chemical and/or corrosion resistance when cured.