Device and method for sealing or repairing a leaking and/or damaged location on an inner wall of a pipe

A method for sealing or repairing a leaking and/or damaged location on an inner pipe wall of a pipe, the method including the following steps:

• a. providing a volume-expandable bellows body, wherein the bellows body is made of a multilayer material, wherein the outer surface of the bellows body is formed by an outer material layer of the multilayer material,
• wherein multiple layers of the same or different materials are connected to each other in a firmly bonding or form-fitting manner and form a bellows body wall, and either the outer material layer is at least partially formed from Para rubber or silicone and forms the carrier portion, or
• the outer material layer has a Para rubber coating or silicone coating which forms the carrier portion and which at least partially covers the outer surface of the bellows body, or
• wherein the bellows body is made of a single material layer, wherein the outer surface of the bellows body is formed by the single material layer, and the material layer has a Para rubber coating or silicone coating which forms the carrier portion and which at least partially covers the outer surface of the bellows body,
• wherein a carrier portion for a resinated sealing mat is formed on an outer surface of the bellows body;
• b. arranging a resinated sealing mat on the carrier portion;
• c. positioning the bellows body in the interior of the pipe in the region of the leaking and/or damaged location;
• d. infiltrating a fluid, into a bellows body interior, wherein the bellows body expands as a result of the fluid infiltration while increasing its volume;
• e. fastening the resinated sealing mat to the inner pipe wall by:
• i. pressing the resinated sealing mat against the leaking and/or damaged location on the inner pipe wall of the pipe as a result of the expansion of the volume of the bellows body, and
• ii. curing the resinated sealing mat;
• and
• f. removing the bellows body from the pipe.