*Mapei Mapeflex PB27

This product is now discontinued.
In stock
Product Description

Please note this product is now discontinued. Please contact our Technical Team for a suitable alternative.

Mapeflex PB27 is a two-component flexible sealant based on polyurethane polymers modified with hydrocarbon resins used on concrete floors in car parks, service areas and industrial buildings and Airport Runways.

Best Uses

  • Sealant for floor joints resistant to hydrocarbons.
  • Some application examples
  • Sealing joints of airport runways.
  • Sealing contraction joints on concrete floors in car parks, service areas and industrial buildings subject to vehicle traffic.
  • Flexible sealing around machine bases in heavy industry where a high resistance to hydrocarbons is required.


Mapeflex PB27 is a two-component self-levelling flexible sealant made up of hydrocarbon and polyhydric alcohol resins (part A), and a special isocyanate - based hardener (part B). The setting time and pot life depend on the ambient temperature. The working time of the mixed product, at a temperature of +23 degrees C, is approx. 45 minutes.

The two-parts are carefully mixed together to obtain a flowable self-levelling black paste.

In order to ensure the correct function of the sealant, Mapeflex PB27 must be able to stretch and contract freely. Therefore, Mapei Mapeflex PB27 must adhere perfectly only to the sides of the joints and not to the bottom, and the depth of the joint must always be less than the width.

Technical Details
  • The joint must be sized so that the maximum foreseen movement is less than 25% of the total width. In order to control the depth of the sealant avoiding its adhesion to the botton of the joints, expanded polyethylene foam, for example Mapefoam, must be applyed before the application of Mapeflex PB27.
  •  A coat of Primer PU60 must by applied to the sides of the concrete joint and let dry for 30-60 minutes before applying Mapeflex PB27.
  • The filling of the joint is carried out in the usual way, pouring the properly mixed two parts of Mapeflex PB27 from a container with a spout. Masking tape may be needed on and around the joints in order to prevent overflow onto surface.

Technical Info

Components: Two Components
Type: Polyurethane Polymers
Finish: -
Colours: Part A: Black, Part B: Yellowish - Colour of mix: Black
Tintable: No
VOC Content: -
Dry Solids Content 100%
Suitable Substrates: Sealant for floor joints resistant to hydrocarbons
Application Temp Range: from +5°C to +35°C
Theoretical Coverage: Consumption depends on the dimensions of the joint. The density of PB27 is 1.4 g/cm3. A 10x10 mm joint requires approx. 140 g/m.
Wet Film Thickness (WFT): -
Dry Film Thickness (DFT): -
Working Time Mixed: 45 minutes at 23°C
Pot Life: 45 Minutes at 23°C
Setting Time: 10 hours
Set To Light Foot Traffic: After 24 hours
Fully Cured: 7 days

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