Infragard concrete and manhole rehabilitation products from Infrastructure Repair Systems include Topcoat and Chim Coat, which are nonhazardous ambient cure epoxy systems for a small patch, an entire manhole or a retaining wall. This cost-effective solution requires no expensive equipment, as it has an easy trowel-on application. They are corrosion resistant and high strength, with an impermeable structural bond to the substrate or to most any concrete or metal surface. Chim Coat is engineered with a flexible feature that maintains adhesion while expanding or contracting with changing temperatures and traffic loads. 877/327-4216; www.irsi.net.