CX JOINT SEALANT PU

CX JOINT SEALANT PU is elastic, single component, self-leveling, moisture curing polyurethane sealant specifically developed to be used as a multi-purpose floor joint sealant in applications where high chemical resistance to fuels, oil sand hydro carbons is required.
The product is suitable for sealing expansion, construction and dummy joints in rigid pavements,apron areas, runways, taxi tracks, parking bays, hangars and internal and external pedestrian and trafficked  joints. Concrete roads, petrol stations ,warehouses, show room set care other application areas.

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Benefits
  • One part - no mixing on site, therefore superior to mix-ratio sensitive products.
  • Very fast tack-free time
  • Self-leveling - good contact ensured to joint surface - easy to apply
  • Pitch-free
  • Movement capability +/- 25%
  • Bubble-free curing, no weak areas for air bubbles to develop
  • Good mechanical and chemical resistance
  • Very good adhesion to most construction material sespecially concrete with out the need of primer
  • Permanently elastic over a wide range of temperatures
  • Conforms to ISO 11600 F 25 HM, BS 5212:1990 Type FB, EN 14187-5
Mechanical Properties
propertiesValues
Chemical Basis : Polyurethane
Cure Mechanism : Moisturecuring
Specific Weight : 1.42 +/- 0.02gr/cc
Viscosity : 30.000-40.000cps
Tack free time at 23°C and 50% r.h : ≈ 40 minutes
Curing at 23°C and 50% r.h. : Š 2,5 mm/24h
Hardness Shore A (DIN 53505) : 25-30
Elastic modulus at 100% (DIN 52455) : Š 0,5 N/mm2
Tensile strength (DIN 53504) : 1,5 N/mm2
Elongation at break (DIN 53504) : Š 800% 
Elastic recovery (DIN 52458) : Š 90% 
ApplicationTemperature : +5°C-+35°C 
TemperatureResistance : -40°C-+80°C 
Application

Instructions

  • Application :
    • Recommended application temperatures: 5° - 35°C. For easier use or cold weather application we recommend the material is stored at approximately 25°C prior to use.
    • In order to guarantee free movement of sealant in joints, it is imperative that the sealant does not ad here to the bottom of the joint ,there for ejoint backer rod should be used at the proper depth.
    • Apply appropriate primer to joint sides and observe waiting time to avoid any air bubbles which may arise from the solvent heating under un-cured sealant.
    • Firmly extrude sealant into the joint making sure that it is in full contact with the sides of the joint and with the backing rod at the bottom.
    • Keep the nozzle in the sealant, continue on with a steady flow of sealant preceding the nozzle to avoid air entrapment.
    • Avoid overlapping of sealant to eliminate entrapment of air. Masking tape should be used where sharp exact joint lines or exceptionally neat lines are required. Remove the tape whilst the sealant is still soft.
  • Surface preparation : • Joint surfaces must be dry, clean and free of all contamination. Glass, metal and other non-porous surfaces must be free of any coatings and wiped clean with solvent. Precast panels using form-release agents other than polyethylene film must be sandblasted or mechanically abraded and dust free.
  • Priming:
    • CX JOINT SEALANT PU has excellent adhesion properties even without the use of primer on most common building materials. However, natural stone, paints, coatings and other treatments of surfaces may presents a difficult surface to which to adhere. Due to the number of unpredictable nature soft substrates,preliminary test is recommended. PU Primer may be required for porous surfaces.

Precautions

  • Health & Safety instructions :
    • Ensure that protective gloves, overalls and protective footwear are worn at all times when handling the material. Avoid skin contact. Should the material come in contact with the skin it may be removed with soap and warm water.
    • If discomfort continues, seek medical advice. If product comes in to contact with eyes, rinse with plenty of fresh water and seek medical advice. For full updated information please see Material Safety Data Sheet.
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