The KOS Fire Cement (300ml or 500g tub) is a high temperature repair and sealing compound supplied in a convenient cartridge format, offering the same trusted formula as the KOS Fire Cement Tub but with easier, more controlled application. Designed for use in both domestic and industrial settings, it is ideal for sealing, fixing and repairing fire-exposed materials where a strong heat-resistant bond is required.
This ready mixed formulation is made from a blend of thermo setting resins and temperature resistant inorganic fillers, which cure when exposed to heat to form a seal capable of withstanding temperatures up to 1250°C. This makes it a highly practical choice for areas subject to intense heat, particularly around fireplaces, stoves and other combustion-related installations.
The KOS Fire Cement is especially suitable for fixing and repairing fire backings, as well as sealing and repairing other heat-exposed joints and surfaces. It offers excellent adhesion to a range of materials including fire bricks, blockwork, stone and clayware, making it a versatile maintenance and installation product for fireside and heating applications.
Although supplied in a sealant gun cartridge, it is also described as easy to apply by trowel, giving useful flexibility depending on the job and the installer’s preferred working method. This combination of easy handling and high heat resistance makes it a practical option for both routine repair work and more involved installation tasks.
The product is also asbestos free, offering added reassurance for modern use. Available in Black or Buff, it can be chosen to better suit the appearance of the repair area or surrounding materials.
Key Features
- High temperature fire cement
- 300ml/ 500g tub
- Same formula as KOS tub version
- Ready mixed formula
- Heat resistant up to 1250°C
- Suitable for fixing fire backings
- Suitable for repair work
- Excellent adhesion
- Bonds to fire bricks
- Bonds to blockwork, stone and clayware
- Easy to apply
- Domestic and industrial use
- Asbestos free
- Available in Black or Buff
Expert Insight
A cartridge fire cement can be especially useful where a neater, more controlled application is needed than a traditional tub allows. It gives the same high-temperature performance but can be quicker and cleaner to apply in joints, edges and repair points.
Suitability
The KOS Fire Cement (300ml or 500g tub) is well suited to fire backings, fire bricks, blockwork, stone, clayware, and other heat-exposed repairs or sealing tasks in domestic and industrial settings.
Installation / Technical Notes
This product uses the same formula as KOS Fire Cement Tub but is supplied in a handy sealant gun cartridge. It is a ready mixed blend of thermo setting resins and temperature resistant inorganic fillers that cures when exposed to heat, giving a seal resistant to temperatures up to 1250°C. It is suitable for fixing and repairing fire backings, offers excellent adhesion to fire bricks, blockwork, stone and clayware, and is suitable for domestic and industrial use. The product is asbestos free and available in Black or Buff.

