Cured-In-Place Pipe or CIPP liner system for gravity-flow sewers and culverts is the most proven, cost-effective trenchless pipeline rehabilitation system in the industry. CIPP is the most widely accepted form of trenchless pipeline repair in the industry. IPR has installed more than 23 million feet of CIPP liner, from diameters ranging from 4” to 144”. 

CIPP is the pinnacle of trenchless repairs and is considered the most cost-effective rehabilitation process. CIPP stands for “Cure-In-Place Pipe” and is a resin- saturated felt tube that is inverted into a damaged pipe. IPR creates its CIPP within the designated four wetout facilities throughout the nation. Once the pipe is inserted within the old pipe, it is cured through steam or hot water. After the curing process, technicians cut laterals and open up the ends of the new pipe to reinstate flow. Compared to older methods of pipe rehabilitation, CIPP reduces construction footprint, is cost-effective and guarantees a 50-year pipe lifespan.

Typical applications IPR CIPP liners are an effective rehabilitation tool for damaged concrete, brick, and clay sewer pipes.

  • Sanitary Sewers
  • Storm Sewers
  • Culverts
  • Pressure Applications

Meeting and exceeding the industry's standards

IPR CIPP liners meet or exceed the following ASTM standards for cured-in-place pipeline rehabilitation.


  • Standard practice for rehabilitation of existing pipelines and conduits by the inversion and curing of a resin impregnated tube

D 790 

  • Standard test methods flexural properties of unreinforced and reinforced plastics and electrical insulating materials. 
  • The flexural modulus of elasticity exceeds 250,000 psi 
  • Flexural strength exceeds 4,500 psi

D 638 

  • Standard test method for tensile properties of plastics. 
  • Tensile strength exceeds 3,000 psi.

Advantages: The IPR “CIPP” advantages:

• Minimizes environmental impact and surface disruption

• Restore or improve the host pipe’s structural strength

• Excellent corrosion resistance and protects existing host pipe from further damage

• A smooth inner surface of new pipe liner improves flow capacity

• Far less expensive to rehabilitate an existing pipe than dig and replace it

Two CIPP Options

IPR offers two CIPP repair solutions for all types of pipes. For standard installations, we recommend our standard Isophthalic resin-based liner technology system. For stricter requirements and harsher environments, we offer an advanced epoxy-based lining system featuring eco-friendly Dow epoxy resins. With millions of feet installed worldwide, our system delivers a non-invasive and permanent solution that minimizes downtime and maximizes cost savings.