FDBU20 - Fire Door Bottom Unit

FDBU20 - Fire Door Bottom Unit
Manufacturer: Kilargo

Upgrade your existing fire doors effortlessly with our Retrofit Intumescent Fire Door Bottom Upgrade Seals. Designed for home and office improvement, these seals are the perfect solution when door bottom gaps exceed the allowable 10mm as per AS1905/1.

Key Features

  • Can provide up to 2 hours fire resistance when fitted to the bottom of proprietary fire doors.
  • Non compliant fire doors can be salvaged.
  • Avoids expensive door build-ups or door replacements.
  • Cost-effective solution.
  • Easy retro-fit installation.
  • No need to remove the door during installation.


  • These products consist of an anodised aluminium profile, flame retardant smoke, draught and light excluding silicone gasket and integral high performance intumescent fire seals.

Gap Size

  • To seal gap sizes up to 20mm maximum, under nom. 35mm and 45mm proprietary doors.


  • Standard lengths: 820mm, 920mm, 1220mm


  • Colours: Clear Anodised (Silver) with grey gaskets


  • The FDBU20 is supplied with pre-drilled slotted holes and screws for easy application onto the bottom of door leafs.

Approval and Compliance:

  • AS1530 Part 4 Tested: Our seals have undergone rigorous testing to meet the requirements of AS1530 Part 4, offering up to 2 hours of fire resistance on proprietary fire door assemblies.
  • BCA Specification C3.4 Compliant: Our seals conform to BCA Specification C3.4 for smoke sealing requirements.
  • Manufacturer Approval: For specific door approvals, we recommend consulting your door manufacturer.

Upgrade your fire doors with confidence using our Retrofit Intumescent Fire Door Bottom Upgrade Seals. Ensure safety, compliance, and cost-effectiveness with an easy installation process. Explore our range of sizes and enjoy the peace of mind that comes with enhanced fire resistance.

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