NBS Source
Sikaflex® PRO-3


A one-part, gun grade, moisture-curing, i-Cure Technology polyurethane based, elastic joint sealant with high mechanical and chemical resistance. Designed for movement and connection joints in floors, pedestrian and traffic areas (e.g. parking decks, car parks), warehouses and production areas, applications in the food industry, sewage treatment plants, tunnel construction and in cleanrooms.

Features and benefits:

  • Very high mechanical and chemical resistance.
  • Bubble-free curing.
  • Good adhesion to most construction materials.
  • Solvent-free.
  • Very low emissions.

General information

Specification data - Polyurethane (PUR) construction joint sealants

Product Reference

Sikaflex® PRO-3

Standard product features

Chemical base:

i-Cure® Technology polyurethane.

Technical information:

  • Density: ~1.35 kg/L.
  • Service temperature: -40°C to +70°C.
  • Application temperature: +5°C to +40°C.
  • Shore A Hardness (ISO 868): ~37.
  • Tensile Modulus at 23°C (ISO 8339): ~0.6 N/mm² at 100% elongation.
  • Tear Propagation Resistance (ISO 34): ~8.0 N/mm.
  • Movement Capability (ISO 9047): ± 25%.
  • Elastic Recovery (ISO 7389): ~90%.
  • Skinning time: ~60 minutes.
  • Curing rate: ~3.5 mm/ 24h.
  • Sag flow (ISO 7390): 0 mm.
  • Elongation at break (ISO 37): ~600%.

Product Options


Sika Primer 3N Moisture Resistant Primer (specified separately).

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