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Parchem Construction Supplies

Nitoseal MS250

Nitoseal MS250

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Ultra UV resistant elastomeric joint sealant.

Previously known as Duraflex.



Fosroc Nitoseal MS250 is a high performance elastomeric joint sealant based on Silyl Modified Polymers. It offers the weathering and adhesion performance of a silicone sealant together with the toughness and the stain-free properties of a polyurethane sealant.


  • Easy to extrude – even at low temperatures
  • 50% joint movement capability
  • Outstanding weathering and UV resistance to maintain colour and integrity
  • Excellent primerless adhesion to concrete, timber, masonry, aluminium, metal and ceramics
  • Will not stain masonry or other surfaces
  • Blister free cure in high humidity or on damp surfaces
  • Low odour and very low VOC 15g/L
  • Contains no isocyanate

Technical Data Sheet

Safety Data Sheets

Additional Information

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