FulaFlex 625 Hybrid Polymer Sealant

FulaFlex™ 625™ is a high performance, solvent free, moisture curing hybrid polymer construction sealant that provides a non-hazardous alternative to traditional polyurethane construction sealants. It cures to form a seal that is tough, elastic and weatherproof with good chemical resistance. FulaFlex™ 625™ is a low modulus product ideal for sealing joints where high joint movement is anticipated.

Key Benefits

  • Isocyanate and solvent free
  • Permanently flexible; ±25% joint movement capability (ISO 11600 Type F, Class 25, Subclass LM)
  • UV and weather resistant - will not yellow (tested to 3000hrs QUV-B according to ISO 4892-3, CYCLE 2)
  • Excellent long term resistance to seawater, caustic solutions and cleaning agents
  • Strong adhesion to a wide range of substrates without priming
  • Exhibits no shrinkage or bubble formation during curing
  • Does not sag or slump in joints up to 35mm
  • Zero VOC
  • Paintable


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

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

  • 440g Cartridge
  • 600ml Sausage


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