Koster PU-Flex 25

Koster PU-Flex 25

Koster PU-Flex 25 is a highly elastic, one component, low modulus polyurethane joint sealant.

Koster PU-Flex 25 is a remarkable sealant used for between concrete, mortar, brickwork, natural and synthetic stone, metal, steel, aluminium, wood, ceramic tiles and rigid plastics.

Koster PU-Flex 25 is one component and cures with moisture to form a flexible sealant which can be overpainted after curing is finished.

This unique sealant is highly thixotropic with positive workability.

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Koster PU-Flex 25
  • Highly elastic
  • Non-sagging
  • Good workability
  • Environmentally Friendly
  • Seamless Application
  • Easy smoothing
  • Highly thixotropic
  • hot temperatures shorten curing time of material
  • Good UV Resistance
  • Excellent adhesion to typical construction materials
  • Easy application using a silicone gun
  • Polyurethane based

Straight after used clean tools/machinery polyurethane solvent.

Low temperatures lengthen curing time.

Koster PU-Flex 25 Contains isocyanates, avoid direct skin/eyes contact. If contact does occur rinse area well with clean water and soap, then seek medical advice.

Product Details
Koster PU-Flex 25
Product Code:
Grey (once cured)
Approx. 1.32gr/cm³
Technical Drawings

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