CentriPipe centrifugally cast concrete pipe lining from AP/M PERMAFORM provides trenchless, structural spin-cast lining of culverts using PL-8000 specialty mortar. 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.