FulaFlex 550LM PU Low Modulus Sealant

FulaFlex™ 550LM™ is a one component moisture-curing low modulus Class A polyurethane sealant with excellent joint movement capabilities. It cures to form a flexible, durable and weather proof sealant and exhibits excellent adhesion to a wide range of common construction substrates. 

Key Benefits

  • Low modulus, Class A joint sealant
  • Excellent flexibility (tested to ±35% ISO 9047)
  • High performance - Excellent adhesion to many surfaces
  • Good UV and weather resistance - can be used internally or externally
  • Paintable
  • Fast skin formation and cure rate compared to traditional low-modulus polyurethane sealants
  • ASTM C920 Type S, Grade NS, Class 25 certified
  • ISO11600/F/25LM certified


  • Building joints with high movement
  • Joints in pre-cast and tilt-up concrete elements
  • Expansion joints in fibre cement facades
  • Connection joints between windows, door frames and walls
  • Joints in brickwork, masonry and blockwork
  • Perimeter fillets in waterproofing membrane systems

Compatible Substrates

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

Packaging Options

  • 310ml Cartridge
  • 600ml Sausage


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