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NF 302 PU Sealant - Construction

NF 302 PU Sealant - Construction

 

Product Description

 

NF 302 PU Sealant is a one-component, low-modulus polyurethane sealant that cures on exposure to atmospheric humidity. It possesses excellent adhesion to all typical construction materials, such as cement-based materials, brick, ceramic, glass, wood, galvanized and painted sheet iron, and various plastics.1 This sealant offers permanent elasticity, thixotropic properties (no sagging), and a tack-free surface after full cure. It does not pick up dirt, exhibits no shrinkage, and has enhanced storage stability. NF 302 can be applied with a hand gun and tooled easily, making it suitable for various construction applications. It is also paintable and cures bubble-free, ensuring a smooth and aesthetically pleasing finish. NF 302 has a 25% movement capability and conforms to BS 6920 for metallic water-soluble impurities. It also meets the requirements of VOC content specifications in LEED credit EQc4.1 “Low-emitting products” of SCAQMD rule 1168.2

 

Features

 

  • Possesses permanent elasticity.
  • No sagging – Thixotropic.
  • No surface tackiness after full cure.
  • Does not pick up dirt.
  • No shrinkage.
  • Enhanced storage stability.
  • Can be applied with a hand gun and tooled easily.
  • Paintable.
  • Cures bubble-free.
  • 25% movement capability.
  • Conforms to BS 6920 for the metallic water soluble impurities.
  • Conforms to the requirements of VOC content specifications in LEED credit EQc4.1 “Low-emitting products” of SCAQMD rule 1168.3

 

Applications

 

  • Expansion joints between many different construction materials.
  • Bonding of roof tiles.
  • Installation of PVC window frames.
  • Connection joints between wood window and door frames and walls.
  • Joints between prefabricated construction materials.
  • Sealing and bonding of ventilation ducts, gutters, and spouts, etc.
  • For expansion joints between pre-cast concrete panels.

 

Specifications

 

  • Code: NF 302
  • Colors: White, Black, Grey
  • Volume: 310 ml, 600 ml
  • Box: 12
  • Basis: Polyurethane Polymer
  • Consistency: Paste
  • Curing Mechanism: Atmospheric moisture
  • Curing Density: 1.20 ± 0.05 g/ml (ASTM D792)
  • Tack-free time: 45-60 minutes (23°C and 50% R.H)
  • Curing Rate: 3-4 mm/day (23°C and 50% R.H)
  • Sagging: 0 mm (ISO 7390)
  • Temperature Resistance: -40°C to +90°C
  • Application Temperature: +5°C to +40°C
  • Hardness Shore A: 40-50 (after 28 days)
  • Paintability: Paintable with most paints
  • Elastic Recovery: ≥ 75% (ISO 7389)
  • Movement Capability: 25%
  • Elongation at break: ≥ 700%
  • E100 Modulus (23°C): 1.0-1.5 N/mm2
  • E100 Modulus (-20°C): 2.5-3.0 N/mm2
  • Tensile Strength: 1.5-2.0 N/mm2
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