Transfer coating for sewer liners.

Trenchless sewer renovation is a modern sanitation concept for pressureless waste-water networks (e.g. drainage) that are mainly located underground. A waterproof coated textile liner strengthened by resin is inserted into the leaking sewer using an inversion process in order to harden it under specific conditions. This creates a pipe within a pipe. The liner gets its functionality and suitability for use in this specific situation from Ploucquet’s special coating applications.

Advantages of technology.

In contrast to the complete exchange of pipes, trenchless sewer renovation does not need any or needs only small amounts of earth to be moved, meaning reduced downtime, costs and environmental impact. Once the coated liner has been hardened, the newly created leakproof pipe takes over the tasks of the defective pipe and thus the draining of waste water. Sewer renovations in motorways, airport runways and docks can all benefit from this innovative technology, especially since there are very few alternatives available.


A three-layer transfer coating on a PU base is laminated onto a substrate. This has a cut width of max. 185 cm. Our plant can coat piece lengths of up to 220 m with a substrate thickness of up to 8 mm and has a laminator feed width of max. 195 cm. In terms of water-resistance, resin-resistance, elongation behaviour and mechanical durability, the special coatings can be tailored to the individual installation requirements of the customer.

In-house development.

For private house sanitation, Ploucquet has developed the coating product ROSA-S. Elongation behaviour and resin uptake of the liner is tailored perfectly to the specific requirements of this area. Legal requirements concerning the quality of waste-water pipes are making the use of a coated in-liner increasingly attractive for private households.

Coating and lamination on commission.

Its comprehensive and specialized expertise means that Ploucquet is now one of the top suppliers for customers in the industrial and private sewer-renovation sectors. Fleece and felt substrates in various weight categories and thicknesses can be individually processed for special applications. Insofar as lamination is concerned, substrate materials with corresponding films can be processed up to a final width of over 200 cm.