PENTENS FLEX-609  Single Component Polyurethane Joint Sealant

PENTENS FLEX-609 single component polyurethane, cures to form a soft elastomeric weatherproof seal and it is specifically designed for waterproofing and sealing of external and internal expansion and construction joints in buildings and engineering structures.


  • Single component, easy to apply
  • Good bonding on various substrates
  • Soft elastic with 25% moving capacity
  • Excellent resistance to weather conditions /High durability
  • Waterproofing
  • Will not crack
  • Non-sag
  • Non staining


  • Expansion joints
  • Construction joints
  • Precast
  • Brick and blockwork
  • Window and door frame sealing
  • External cladding
  • Curtain wall



Surface Preparation
The borders of the joints must be clean, dry, and free from loose particles, oil fat and any other contaminants. Metallic surfaces have to be made completely free from oxidation fat or other contamination by using grinders and/or cleaner.

PENTENS FLEX-609 is delivered ready-to-use in economical 600 ml vacuum packed sausages and can be applied by hand or air operating guns.
When applying the material avoid cavities andbubbles.
After application smooth the surface with a wet knife or spatula.
It is advisable to put an adhesive tape along the border of the joint to guarantee clean work.
Remove the adhesive tape immediately after smoothening.


Impervious gloves and barrier cream should be used when handling these products.
Eye protection should be worn. In case of contact with eyes, wash thoroughly with plenty of water and seek medical advice if symptoms persist.
If contact with skin occurs, it must be removed before curing takes place.
Wash off with an industrial skin clearer followed by plenty of soap and water. Do not use solvent.
Ensure adequate ventilation when using these products.​