Slip lining is a time-tested trenchless method where a new carrier pipe of a slightly smaller diameter is pulled or pushed into a failing host pipe to restore its functionality. Once the new pipe—typically made of HDPE or GRP—is in place, the annular space between the two pipes is filled with specialized grout to ensure structural stability. This method is exceptionally effective for large-diameter culverts and gravity sewers that have suffered severe structural deterioration. It provides a brand-new hydraulic surface that can significantly improve the flow efficiency of the entire system.

• VersatilitySuitable for circular, egg-shaped, and non-standard pipe geometries.
• StrengthProvides a standalone structural solution independent of the host pipe.
• EconomyOne of the most cost-effective methods for large-scale rehabilitation.
• ProtectionGrouting prevents future movement and protects against external corrosion.