Sika Duoflex is a two-component, premium quality polysulphide sealant, available in both non-sag and self-leveling versions. Sika Duoflex NS : A non-sag sealant specifically designed for vertical and overhead applications.

  • Tough, elastic, rubber-like seal.
  • Remains flexible with expansion and contraction of building component without adhesive or cohesive failure, under suitable design conditions.
  • Stays resilient within a wide temperature range.
  • Excellent resistance to water, oils, grease, most solvents, mild acids and alkalis.
  • Tenacious adhesion to concrete, metal, wood, glass, stone, ceramic and masonry surfaces in any combination, typically without the need for priming.
  • Effective under constant immersion or saturated conditions, when suitably primed.
  • USDA acceptance (NS grade only).

Sika® Duoflex® is suitable for either exterior or interior use in both static and dynamic joints.
Sika® Duoflex® NS is suitable for sealing:

  • Joints in precast concrete.
  • Joints in glass and metal curtain wall construction.
  • Expansion and control joints in concrete and masonry walls.
  • Joints in metal siding.
  • Perimeters of aluminum

Not suitable for:

  • Joint movement more than 25%.
  • Glazing applications.
  • Improperly prepared or contaminated surfaces.
  • Joints involving adhesion to painted surfaces.
  • Primary and secondary immersion applications; Sika® Duoflex
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