Fulaflex 650FC 1-part high performance hybrid moisture curing sealant and adhesive

Fulaflex 650FC is a high performance, 1-part hybrid moisture curing construction sealant and adhesive, which cures to form a seal that is tough, elastic and weatherproof. Fulaflex 650FC is a high modulus product, which can be used in trafficable areas such as concrete saw cuts in commercial buildings.



* Isocyanate and solvent free

* Non hazardous according to GHS classification

* Permanently flexible in temperatures ranging from -40°C to +100°C with short periods at 120°C

* No shrinking, no bubbling

* Excellent primerless adhesion to many substrates

* No sagging

* High mechanical/dynamic stress resistance - shock/impact resistant

* Neutral adhesive - does not attack bonded surfaces

* Vibration and sound dampening properties

* High bond strength - suited to professional and DIY, construction, marine and automotive environments

* Excellent weathering resistance - good colour stability and weather resistance

* Over paintable wet on wet with many waterbased or solvent based paints (pre testing recommended)

* Resistant to water, dilute alkalis, cleaning agents, lime water and mould

  • Glass
  • Plasterboard
  • Polystyrene
  • Timber
  • Steel
  • Plastics
  • Masonry
  • Aluminium
  • Concrete
  • Cement Sheet
  • Acrylic


* Avoid exposure to high levels of chlorine

* Do not use in joints deeper than 15mm without the use of a suitable backing rod

* Avoid contact with alcohol and other solvent cleaners during cure phase

* Pre testing may be required on marble or other highly porous stone - finish may be affected

* Solvent based coatings may remain tacky

* Do not use on bituminous surfaces

* Do not use on materials that bleed oil and plasticisers or solvents, as this will affect adhesion

  eg most rubbers

* Not a fire rated or glazing sealant. Not suitable for glazing with glass, acrylic or polycarbonate sheets

* Not suitable for swimming pools or hot tubs. 

Other available formats