InstaCureRez from Gadmon Industries, distributed in the U.S. by Easy-Liner, gives CIPP contractors up to a 120-minute working time. The resin is very stable at temperatures under 48 degrees F. Once temperatures rise above 90 degrees F, a near-instant reaction occurs. There is no need for recirculating water. Just fill the liner up with water at 110 degrees F. 888/639-7717; www.easy-liner.com.