Hi-Flex 50 - MS Polymer-Based Hybrid Sealant 600ml


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Hi-Flex 50 is a high-performance single component elastomeric joint sealant based on Hybrid MS Polymer technology. With its neutral cure formula and low modulus, it offers excellent movement capabilities and exceptional UV and weathering resistance in all climates. Hi-Flex 50 exhibits outstanding bond strength and prime-less adhesion on most common construction substrates. This sealant is highly durable and resistant to gassing, eliminating bubbling even in high humidity applications.


  • Outstanding primer-less adhesion on non-porous substrates
  • Movement capability up to +/- 25%
  • Non-bleeding/non-staining
  • No isocyanates, solvents, or acids
  • Excellent UV and weathering resistance
  • Easy gunning and tooling
  • Low V.O.C - Green Star Compliant
  • Paintable


Hi-Flex 50 is a versatile sealant suitable for various applications, including:

  • General purpose sealing
  • Expansion and 50 joints
  • Sealing and finishing external wall and cladding joints, such as modern facade panels
  • Waterproofing applications, including fillet joints and bond breaker
  • Sealing joints in prefabricated buildings or concrete panels
  • Window fixing and commercial shop fronts
  • Bonding and sealing in automotive and marine manufacturing


Priming is not normally required, but some difficult surfaces may need treatment. We recommend conducting preliminary compatibility tests prior to application for desirable results.

Physical Properties:

  • Type of product: MS Polymer
  • Curing system: Neutral
  • Density (specific gravity): 1.64 +/- 0.05 (ASTM D1475)
  • Consistency: Non-sagging paste
  • Elongation at break: 200% approx. (ASTM D412)
  • Application temperature: 5°C to 40°C
  • Service temperature: -40°C to 100°C
  • Movement Capability: +/- 25% (ASTM C719)
  • Hardness Shore A: 55 approx. (ASTM D2240)
  • VOC: 1.5% (USEPA)
  • Shelf life: 12 months
  • Clean up: MEK, Toluol, Some industrial cleaning wipes
  • Colours: Grey

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Hi-Flex 50 - MS Polymer-Based Hybrid Sealant 600ml

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