Method and kit for non-destructive in situ repair (relining) of deteriorated pipelines

A method for in situ non-destructive remediation and/or repair of a pipeline comprising the steps of:

• i. making available a first composition comprising:
• (a) at least one resin selected from the group consisting of an acrylic, methacrylic, unsaturated polyester, acrylate polyester, epoxy acrylate, polyurea acrylate, bisphenol acrylic, vinyl, vinyl ester, vinyl ether, polyether acrylate resin, and a combination thereof;
• (b) at least one resin selected from the group consisting of an epoxy, oxirane, oxethane, polyurethane, cycloaliphatic epoxy resin, and a combination thereof;
• (c) at least one photo-initiator compound that can be photoactivated by irradiation with an actinic light source having a wavelength between 100 and 600 nm;
• ii. adding to the first composition:
• (d) at least one co-hardener compound selected from the group consisting of a semilatent hardener, a hardener at room temperature, and a combination thereof, an action of said co-hardener compound not depending on a presence and/or persistence of irradiation with the actinic light source having a wavelength between 100 and 600 nm,
• thereby creating a second composition;
• iii. impregnating a substrate with the second composition;
• iv. inserting the impregnated substrate inside the pipeline to be remediated and/or repaired;
• v. expanding or everting said substrate against internal surfaces of the pipeline by applying a flow of a gas or a liquid up to a pressure that is predetermined and constant;
• vi. activating the at least one photo-initiator compound comprised in the second composition by the irradiation with the actinic light source having a wavelength between 100 and 600 nm;
• and
• removing application of the flow of gas or liquid under the pressure.