Skip to content
* * * Free two-day shipping on domestic orders $350+ (some exclusions apply) * * * Phone to check your item is in stock before picking up * * *
Free two-day shipping on domestic orders $350+ (some exclusions apply)

Bostik Xtreme Fire Seal Box of 12

by Bostik
$207.12 inc.GST
SKU BOS30610680

Fire Retardant High Performance MS Sealant

Key Features

  • Up to 4 hours fire resistance - tested in accordance with AS 1530.4-2014
  • Water potable - Tested in accordance with AS 4020
  • Also suitable for wall/ceiling and wall/floor joints
  • Applicable for joints up to 30mm wide
  • Prevents unwanted airflows
  • Resists fungus and vermin
  • Not corrosive towards metals
  • UV, weather and water resistant
  • Excellent processing and easy toolability
  • Accommodates joint movement up to 25%
  • Paintable with most water and oil based paints
  • Durable and odourless

Where to Use

  • Internally & Externally
  • Expansion control joints and around service penetration up to 30mm wide

Substrates & Materials

  • Stone
  • Concrete
  • Glass
  • Plasterboard
  • Ployurethane
  • PVC
  • Hard Plastics
  • Enamel
  • Ceramic
  • Copper
  • Lead
  • Zinc
  • Aluminium
  • Alloys
  • Stainless Steel
  • HPL & Cement Fibre Panels
  • Wood & Paint Systems

MS Polymer Sealants

A better seal for longer

Getting the best possible sealant matters! When it matters, you should rely on the best sealant there is from Bostik.

Using the benefits from Modified-Silyl Polymer (MSP) technology, you can be certain that you a using a product that has been developed to produce a seal that waterproofs and weatherproofs a wide variety of building materials well into the future.

Furthermore, this formulation is free of solvents and other hazardous chemicals to produce an environmentally friendly finish.

MS polymer sealants: Smart innovations

The secret lies in the unique hybrid formulation where the strength of a polyurethane is combined with weathering resistance of silicones to create a new product technology. 

This means Bostik’s range of MSP technology-based products offers:

  • Greater flexibility over broader temperatures while offering greater heat resistance
  • Solvent-free and isocyanate-free formulations that make them ideal for use around the home or for green build construction
  • Can be painted over with water-based or acrylic paints
  • Adhesion to a greater number of building materials and substrates
  • Fast curing properties that will not slump or bubble
  • Easier to tool out even in colder temperatures

Technical Data Sheet


  • Item: Bostik Xtreme Fire Seal
  • Quantity: Box of 12 
  • Size: 290ml ctg and 600ml Ssg
  • Other: One pallet = 112 Boxes of 12 Ctg and 56 Boxes of 12 600ml Ssg