Trenchless CentriPipe from AP/M Permaform is a cost-effective, no-dig solution for structural lining of culverts using a spincaster and PL-8000 mortar. The precisely placed and compacted concrete liner is applied at the best design thickness for the diameter and conditions. It contains rust inhibitors to prevent corrosion of the old metal culvert, and it is highly resistant to abrasion. This process provides waterproofing, sealing, structural reinforcement and corrosion protection. It maximizes the pipe interior for capacity and flows while providing a fully structural pipe within a pipe. 800/662-6465; www.centripipe.com; Booth #514.