MC-FLEX PU 22 Construct is being applied.

New all-purpose sealant: MC-FLEX PU 22 Construct

The new all-purpose sealant for construction sites

1 Apr 2025

MC-Bauchemie has launched MC-FLEX PU 22 Construct, a one-component polyurethane sealant that is moisture-curing and stands out for its exceptional versatility. Whether for facade sealing, door and window installation, or applications in wastewater management – this flexible, high-performance sealant provides a reliable solution for a wide range of uses.

MC-FLEX PU 22 Construct is being applied with a tool.

MC-FLEX PU 22 Construct is extremely resistant to adverse weather conditions and moisture, making it a durable solution for outdoor use.
©MC-Bauchemie 2026

Thanks to its outstanding adhesion, weather resistance, and flexibility, MC-FLEX PU 22 Construct is the ideal choice for demanding sealing and waterproofing applications, both indoors and outdoors. Combining technical excellence with ease of use, it is the perfect solution for all construction projects.

Versatility meets performance

MC-FLEX PU 22 Construct adheres reliably to various building materials, including mineral substrates, brick, ceramics, glass, wood, galvanized steel, aluminium, and many plastics. It is highly effective for repairing and sealing cracks in facades and other structural components. In wastewater management, where comprehensive concrete protection is crucial for the longevity of structures, MC-FLEX PU 22 Construct is also an excellent choice. The sealant is highly resistant to harsh weather conditions and moisture, making it a durable solution for outdoor applications. It remains elastic and resilient for years, making it particularly suitable for expansion joints and dynamic applications. MC-FLEX PU 22 Construct has a KIWA certification for the wastewater sector and sewage treatment plants that ensures that it meets stringent quality, safety, and environmental standards.

 

The 1-component sealant is easy to apply and available in 600 ml sausage and 280 ml cartridge packaging. Thanks to its thixotropic consistency, it stays in place even in vertical applications. It cures quickly and reliably with ambient moisture without changing volume or requiring additional hardeners. Once cured, the sealant can be painted over effortlessly, seamlessly integrating into any facade design.

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