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Silicoflex Joint Sealing System

Product Features

GSI Highway Products is the exclusive Texas Distributor of RJ Watson’s innovative Sealed Expansion Joint system, the Silicoflex Joint Sealing System. Silicoflex was developed out of the need for a joint sealing system that was easy to install and offered a long, effective sealing life.

Silicoflex consists of an inverted ‘V’ shaped, performed, extruded silicone rubber seal, with a single component silicone locking adhesive and primer. Two beads of silicone locking adhesive are used; one above and below the silicone rubber seal to ensure a tenacious, water-tight and continuous seal.
The Silicoflex Joint Sealing System is a high-performance solution designed for long-lasting protection of bridge and highway joints. Utilizing a preformed silicone seal, it provides superior resistance to water infiltration and extreme weather conditions. The system is engineered for easy installation and minimal maintenance, ensuring a durable, watertight joint that enhances the longevity and safety of infrastructure. Silicoflex is the go-to choice for engineers and contractors seeking reliable sealing solutions that withstand the test of time and harsh environmental conditions.
Silicoflex joint sealing system by RJ Watson
  • Durometer (Shore A): 55 ± 5
  • Tensile (PSI): 1,000 min (6.89 MPa)
  • Elongation (%): 400% min
  • Tear (die B PPI): 100 min. (17 kN/m)
  • Compression Set (212°F, 70hrs): 30% max
  • Tensile Strength (PSI): 225
  • Elongation (%): 550
  • Tack Free Time (Minutes): 5-20
  • TCure Time (1/4″ bead) (hours): <24
  • VOC (g/L): 50
  • Hardness Shore A: 27
  • Modulus, 100% Elongation (PSI): 55
  • Dynamic Joint Movement (%): ±50
  • Peel Adhesion Strength (Pli) after 7 Day Water Immersion: 21.4
  • Resistance to UV: No cracking, Ozone Chalking, or Degradation
  • Viscosity (centipoises): 44
  • Color: Light Amber
  • Specific Gravity: 0.92
  • Flash Point (F°, T.C.C.): 48
  • Solids (%): 41
  • Cleaning: Mineral Spirits
  • VOC (g/L): 520 (not for use on non-porous surfaces in areas) requiring VOC levels
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