National Liner LLC
About
National Liner LLC, operating since 1992 and headquartered in Pewaukee, Wisconsin, is a manufacturer and distributor of Cured-In-Place Pipe (CIPP) rehabilitation products and provider of CIPP installation services through a certified contractor network across the United States and Canada. The company supplies felt liner tubes manufactured by Applied Felts, the world's largest vertically integrated felt liner manufacturer accredited to ISO 9001:2008, which undergoes a rigorous 28-stage testing system with destructive testing across nine quality characteristics including density, tensile strength, and coating distribution. Each finished liner is tested across seven criteria: circumference, density, length, coating integrity, and weld strengths. National Liner's CIPP systems consist of a polyester felt tube saturated with thermosetting resin, available in diameters from 6 to 84 inches, meeting ASTM D-790 flexural and ASTM D-638 tensile property standards. The company offers three resin types sourced from AOC, Interplastic Corporation, and Reichhold: standard polyester for underground sewer pipe lining, vinyl ester for enhanced corrosion resistance in aggressive chemical environments, and no-VOC resin for environmentally sensitive applications, with catalyst systems from Akzo Nobel and United Initiators SPI. National Liner operates as a franchise network model, certifying and supporting contractor partners with quality CIPP materials, technical design assistance, and ongoing installation support. Partner contractors have collectively installed nearly 30 million feet of CIPP liner, serving municipal sewer systems, force mains, industrial process piping, and specialty applications including airport glycol and deicer collection systems. The company is a proud member of NASSCO.
Key Products
Polyester felt tubes for cured-in-place pipe rehabilitation manufactured by Applied Felts with a single-pass extruded coating process, available in diameters from 6 to 84 inches, tested across 28 production stages and 9 destructive quality characteristics.
Standard thermosetting polyester resin for CIPP pipe rehabilitation of underground sewer pipes, meeting ASTM D-638 and D-790 specifications with tensile strength of 7,220 PSI and flexural strength of 12,300 PSI filled cast.
Enhanced corrosion-resistant thermosetting resin for CIPP lining in aggressive chemical environments where standard polyester may not provide adequate chemical resistance.
Low-emission thermosetting resin for CIPP rehabilitation in environmentally sensitive applications where volatile organic compound emissions must be minimized.
Online engineering design tool for calculating CIPP liner specifications including wall thickness, resin quantities, and installation parameters for rehabilitation projects.
Professional cured-in-place pipe installation through a network of certified contractors across the US and Canada, providing trenchless pipe rehabilitation without excavation.
Franchise and certification program for qualified contractors to become authorized National Liner CIPP installers, including training, materials supply, and ongoing technical support.
Engineering support services for CIPP project design, including liner sizing, resin selection, and installation planning with over 20 years of CIPP experience.
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