Oblitiroot foaming sewer line root control from Olvidium uses the maximum amount of active ingredient dichlobenil allowed by the U.S. Environmental Protection Agency. It comes in two pouches which, when combined, create a sticky foam with a latex base that can be applied through the clean-out or in the toilet bowl. The latex makes it stick to pipes and roots, which causes the dichlobenil vapor to remain in the line to kill roots longer. 855/782-4531; www.olvidium.com.