Sika® Duoflex NS

Two-Component, Non Sag, Polysulfide Sealant

Sika® Duoflex NS is a two-component, non-sag, premium-quality polysulfide sealant, specifically designed for vertical and overhead surfaces. USDA accepted. Sika® Duoflex NS meets - ASTM C-920, Type M, Grade NS, Class 25, Use I, NT, M, G, A and O.

  • Tough, elastic, rubber-like seal.
  • Remains flexible with expansion and contraction of building component without adhesive or cohesive failure, based on good joint design.
  • 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 with Sika® Duoflex Primer-5050.
  • Effective under constant immersion or saturated conditions, when suitably primed.