AV-100 from Avanti International is an ultralow viscosity, chemically reactive gel available as either granules or liquid. It has similar viscosity to water, can permeate anywhere water can travel, and cures within a controllable set time — anywhere from five seconds to more than 10 hours. Once cured, it creates an effective, long-lasting water barrier while providing soil stabilization. It can be used to rehabilitate and sustain stormwater and sanitary sewer collections systems to eliminate infiltration in manholes, mainlines, joints and laterals, and various other underground structures by stabilizing external substrate. By eliminating infiltration, there is a reduction in excess flow to wastewater treatment plants, reduced treatment costs, and added life expectancy of underground infrastructure. 800/877-2570; www.avantigrout.com.