Flow-Liner Cementitious Manhole Rehab Product Information: Flow-Liner MSM Microsilica Modified Repair Mortar™ Flow-Liner Hydraulic Cement™ Flow-Liner CAM Calcium Aluminate Repair Mortar™ Flow-Liner Rapid Cure Vertical Mortar™ Replacement Options: Polyethylene and Polypropylene Manholes and Chambers, both with a min. 50-year life expectancy! Tegra Manhole™ Tegra Chamber™