AV-100 Acrylamide ultra-low viscosity, chemically reactive gel from Avanti International has a similar viscosity as water, 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 sanitary collections systems by eliminating infiltration in manholes, sewer mainlines, joints, laterals, and before and after various forms of CIPP lining. It creates an effective, long-lasting water barrier while providing soil stabilization. 800/877-2570; www.avantigrout.com.