The Vaporooter scientific formula destroys roots on contact and inhibits regrowth for years. It uses a combination of two herbicides that penetrate root cells, destroying roots on contact and binding to pipe walls, joints and cracks to inhibit new growth for years. Computerized application equipment allows operators to jet up the line, push a button and fill the pipe with foam while retrieving the hose. The application system fits any jet truck and is available as an option from many truck manufacturers. 800/841-1444; www.vaporooter.com.