Insignia™ O-rings can be attached to a liner that is inverted into the pipeline to provide a compression seal at the termination points of the liner. This procedure remotely positions the O-rings between the host pipe and the liner tube or between a cured liner and a new liner (cold joint), sealing any annular space and providing a long-term flexible seal. Insignia™ O-rings can be utilized for upper end of lateral liners, a lateral liner overlapping a connection seal, and each end of sectional liners.
The O-rings are frangibly attached on the inside of the liner at any termination point. The liner is resin-saturated and loaded into the launching device and then positioned at the point of repair. Air pressure is applied, and the liner begins to invert embedding the O-rings between the liner and host pipe. The liner is allowed to cure and within 24 hours the the swelling process creates a proven, flexible, long-term and water-tight seal.
Insignia™, when exposed to water, swells to create a positive compression seal preventing any water tracking between the liner and the host pipe. Since the seals are cylindrical in shape, they generate uniform compression that forms a highly effective seal compatible with all types of mainline liners, i.e. inverted CIPP, Pull-in-place CIPP and folded plastic pipe.