FulaFlex 620 Low Modulus Hybrid Polymer Sealant

FulaFlex™ 620 is a high performance, hybrid polymer construction joint sealant engineered on PolyXSil Hybrid Enviro Technology™. It cures to form a seal that is tough, elastic and weatherproof with good chemical resistance. FulaFlex™ 620 is a low modulus product ideal for sealing joints where high joint movement is anticipated.
FulaFlex™ 620 is water, solvent and isocyante free as well as being low odour, low VOC and satisfies the requirements for the Green Building Council of Australia (GBCA).

Key Benefits

  • Made in Australia for Australian conditions
  • Permanently flexible; ±25% joint movement capability (ISO 11600 Type F, Class 25, Subclass LM)
  • Suitable for use in waterproofing applications - meets AS3740-2010 (Waterproofing of Domestic Wet Areas)
  • Excellent resistance to weathering and UV radiation, resists yellowing
  • Excellent long term resistance to seawater, caustic solutions and cleaning agents
  • Strong adhesion to a wide range of substrates without priming
  • Will not sag or slump, shrink, or bubble during curing
  • Paintable


  • Sealing expansion joints and window and door openings in insulated wall systems
  • Sealing expansion and control joints in tiled areas
  • Sealing concrete and masonry walls, window and door frame perimeters, external facades and cladding
  • Sealing roof flashings
  • As a perimeter fillet beneath water-based waterproofing membranes

Compatible Substrates

  • Concrete/AAC
  • Fibre cement sheeting
  • Masonry
  • Brick
  • Ceramic
  • Plasterboard
  • Steel inc. stainless
  • Zinc/galvanised steel
  • Aluminium*
  • Timber
  • Particleboard
  • Many plastics (pre-test)
  • * pre-test powder coated aluminium surfaces due to the wide range of available coatings

Packaging Options

  • 600ml Sausage


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Masonry Grey



Off White