Home > Companies > Mapei (UK) Ltd > Mapeflex PU45

One component, thixotropic, rapid hardening polyurethane sealant and adhesive with a high modulus of elasticity. Used for sealing expansion and distribution joints in concrete walls and floors subject to movement up to 20% used in internal and external shopping centres, car parks, supermarkets and warehouses. Offers a perfect bond for stone and brickwork, metallic elements, such as flashing and guttering, wooden and plastic baseboards, cable beads and decorative gypsum elements.

Related literature

The following content references this product:



  • Primer AS: Recommended if the substrate is weak, or has a slightly powdery surface, if the joints are subject to high mechanical stress or in frequent, prolonged contact with liquids.
  • Primer M: Recommended to improve bonding.

NBS Specification

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This product is associated with the following NBS Create clause:
45-55-75/340 Polyurethane construction joint sealants

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Mapei (UK) Ltd


+44 (0)121 508 6970

Product reference

Mapeflex PU 45


[Not required]
[Primer AS]
[Primer M]

Manufacturer details

Mapei House,
Steel Park Road,
West Midlands, B62 8HD
Tel +44 (0)121 508 6970
Fax +44 (0)121 508 6960
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