Sika Duoflex NS is a two component, non-sag, premium quality polysulfide sealant, specifically designed for vertical and overhead surfaces. Suitable for either exterior or interior use to seal both static and dynamic joints.
Sika Duoflex NS is a two-component, non-sag polysulfide sealant for vertical and overhead joints in concrete, masonry, and metal structures. It maintains long-term elasticity, resists fuel and UV exposure, and offers strong adhesion when paired with Duoflex Primer-5050. With ±25% movement capability and solvent-free performance, it handles dynamic conditions in wastewater facilities, fuel containment zones, precast panels, and industrial settings. It’s easy to mix, apply, and tool—no specialized installation equipment needed.
Property | Value |
---|---|
Movement Capability | ±25% |
Shore A Hardness | 25–30 |
Tensile Strength | 150–200 psi |
Elongation at Break | 500–550% |
Tack-Free Time | Approx. 6 hours |
Pot Life | ~1 hour |
Cure Time | 7 days |
Can Duoflex NS be submerged after installation?
Yes, but it must cure for 7 full days and be primed with Sika Duoflex Primer-5050 for wet exposure applications.
What substrates does it adhere to?
It adheres to concrete, masonry, metals, ceramics, and glass. Priming may be required for critical applications.
Is it suitable for fuel containment joints?
Yes. Duoflex NS offers excellent chemical resistance, making it appropriate for joints in fuel and chemical environments.
How should it be applied?
Mix Part B into Part A using a slow-speed drill. Apply with a bulk gun and tool the sealant while it's still workable.
Brand | Sika |
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Size | 1.5 Gallon |
Manufacturer | Sika |