Aftek Fyreflex Fire Rated Sealant

Aftek Fyreflex Fire Rated Intumescent Sealant is a water-based acrylic sealant suitable for use in internal and external expansion joints and for penetrations requiring a fire-resistant seal and has a 4 hour fire rating to AS1530.4

Fyreflex expands when exposed to fire to form an inorganic plug in joints and voids, assisting in the prevention of fire transmission across partitions in a building. Fyreflex combines exceptional UV and water resistance with excellent flexibility, non-slump properties and ease of application, making it ideal for internal and external application.

Aftek Fyreflex Fire Rated Sealants

Areas of Use

  • Interior & exterior joints between concrete, plasterboard, blockwork, fibre cement and brick walls.
  • Building services’ penetrations including pipes, cable trays, conduit and ducts.
  • Adheres strongly to common construction materials such as cement, concrete, brick, plasterboard, timber, steel, aluminium, glass, and polystyrene.


  • Up to 4 hour fire rating when tested in accordance with AS1530.4 (FCO-1579)
  • Excellent adhesion to most common building materials
  • Easy application, tooling and finishing
  • Good flexibility accommodating joint movement of ± 20%
  • Excellent UV & weather resistance
  • Interior and exterior use
  • Water-based, non-flammable & non-toxic
  • Paintable with water based paints
  • Proudly manufactured in Australia

Available Colours

  • Grey

Technical Data Sheet

Material Safety Data Sheet

Material Safety Data Sheet