AV-100 from Avanti International is an ultralow-viscosity, chemically reactive gel that has a similar viscosity to water. It can permeate anywhere water can travel and has adjustable cure times from five seconds to more than 10 hours. It is used to rehabilitate and sustain stormwater and sanitary sewer systems by eliminating infiltration in manholes, sewer mainlines, joints, laterals, and before or after various forms of CIPP lining. By eliminating infiltration before lining pipes, maximum performance is achieved with an infiltration-free environment. After lining, it can serve as an injection grout for reinstating laterals and sealing the connection. It creates an effective, long-lasting water barrier while providing soil stabilization. 800/877-2570; www.avantigrout.com.