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de neef Flex SLV PURe Product Data

de neef Flex SLV PURe MSDS

Flex SLV PURe is an ultra low viscosity hydrophobic polyurethane designed to be injected into hairline cracks in concrete structures. Flex SLV PURe grout expands on contact with water and quickly cures to a tough, flexible foam that is resistant to most organic solvents, mild acids, alkali, petroleum and micro-organisms.


  • Sealing fine and hairline leaking cracks in concrete 0.02” and finer
  • Injecting grout tubes (INJECTO® Systems)


  • Super Low Viscosity for hairline cracks
  • Free Foam Expansion up to 18 times 
  • Contains no volatile solvents
  • Single Component
  • Controlled reaction time
  • Improved low temperature performance
  • Flex Cat PURe liquid to -40°F


Flex SLV PURe:   
5 gallon metal pail ♦ 
50 gallon metal drum

Flex Cat PURe:  
25 fl.oz. in 1 qt. metal cans

Shelf life:              
2 years.

FLEX SLV PURe is sealed under dry nitrogen because it is sensitive to moisture, and should be stored in original containers in a dry area. Storage temperature must be between 40°F and 90°F. Once the packaging has been opened, the useful life of the material is greatly reduced and should be used as soon as possible.

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