Infragard concrete and manhole rehabilitation products from Infrastructure Repair Systems include Top Coat and Chim-Coat, which are nonhazardous ambient cure epoxy systems for a small patch, entire manhole or 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 almost 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.