Flexible one-component resin for gab injection

CE marking according to EN 1504-5

Product description

WILLSTOP® Flex is a light brown, water-reactive liquid for sealing cracks in reinforced concrete structures or masonry, for sealing excavation enclosures such as sheet pile, diaphragm or bored pile walls, particularly in the event of movement. It is also suitable for permanent, flexible sealing in sewers and accessible shafts.

The end product is characterized by high flexibility and elasticity. When it comes into contact with water, it expands and quickly hardens into a tough, flexible, closed-cell polyurethane foam.

By adding the WILLADD® Flex catalyst accordingly, the resin setting speed can be adjusted to meet temperature and processing time requirements.


Technical specifications

  • highly foaming
  • foam factor ~ 10 - 15
  • flexible
  • closed-cell foam
  • reaction times adjustable between 1 - 5% (weight fractions) by adding WILLADD® FLEX
  • tested with regard to effects on soil and groundwater
Article designationData sheet / Download
WILLSTOP® FLEX & WILLADD® FLEXTechnical data sheet

Packaging units

Item nameSizePackaging
WILLSTOP® FLEX1 kgTin can 1 Liter
WILLSTOP® FLEX10 kgMetal can 10 Liters
WILLSTOP® FLEX20 kgMetal can 20 Liters