Bostik Seal N Flex FC

Bostik Seal N Flex FC is a high performance fast cure one component polyurethane sealant. When cured it will form a tough, flexible seal and bond capable of cyclic, expansion and compression movement. Bostik Seal N Flex FC is virtually unaffected by normal weathering conditions such as rain, sunlight, snow, sleet, ultra-violet radiation, ozone, atmospheric contamination and pollution. Its excellent weather ability enables it to retain its original properties after years of exposure.


  • Fast tack free time and cure rate
  • High bond strength
  • A medium/high modulus product, which forms a resilient and permanently elastic seal
  • Excellent adhesion to most materials including metals, concrete, brick, wood, plasterboard, GRC & CFC
  • Paintable (refer paintability section)
  • Non-slumping
  • Resistant to fungal attack to AS1157.2
  • Potable water approval to AS4020
  • Excellent resistance against hydrolysis, ageing and a wide range of chemicals
  • One component, no mixing required
  • High movement accommodation (+ 25%) ASTMC719
  • Australian made


  • For sealing floor joints
  • Granite, sandstone and marble pointing
  • GRC, fibreglass & most specialty panel systems
  • Trafficable – Plats, stairs, roads, runways, aprons and pavements
  • Vertical-Precast, block work, plasterboard and most common building substrates
  • Pick resistant – prisons, cells, schools and public amenities
  • Chemical resistant – service stations, hangers, aprons and bonded areas
  • Potable water tanks
  • Sealing gaps and adhering most facade and cladding panels to various building materials
  • Sealing construction and expansion joints
  • Perimeter sealing of door and window framing
  • For new construction and remedial applications
  • Adhesive for wide range of building and construction applications
  • For sealing of concrete joints in airport runways

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