Instant Brick Castable Cement


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  • Excellent for replacing and/or repairing fireplace bricks, building or repairing fire pits and pizza ovens and providing a protective covering to materials
  • 4kg = 1 average house brick
  • Suitable for interior or exterior
  • Air-dries in 24 hours
  • Heat resistant to 1000°C
  • Grey colour
  • Certified Australian made and owned
  • Available sizes: 4kg tub
SKU: 40-4 Category:


Instant Brick Castable Cement is a heat resistant air setting & heat setting firebrick mix for repairing or replacing bricks in stoves, fireplaces, furnaces and for lining pot belly stoves. With exceptional strength and abrasion resistance, Instant Brick Castable Cement is asbestos-free and gives off no toxic fumes.

Additional information

Weight 4.13 kg
Dimensions 16.5 × 16.5 × 16.8 cm


  1. Empty whole contents of tub into plastic bucket.
  2. Add water slowly, mixing with a trowel until a dry crumbly paste is obtained.
  3. Add more water SLOWLY until mix is a pliable ball.
  4. On a clean flat surface, mould to the size and shape brick required. Trim with a knife if necessary.
  5. Clean area to be filled removing any loose material and dust. Then wet the area with water.
  6. Place brick in firmly to take up vacant space.
  7. Air dry for 24 hours. Then heatset with a small gentle fire. Your unit is then ready for normal use.


What temperature is the product effective to?

Is it ok for outside on my brick BBQ?
Yes, protect from rain/moisture for 24 hrs until curing process is complete.

I have broken bricks in my fireplace, am I able to spread this over all of the bricks and fill in the hole?
Yes, as this perfect for replacing and/or repairing fireplace bricks.

Can I use instant brick in a load-bearing wall?
It would be best to use concrete, please consult your local hardware for advice.

Can this be used as a render for my pizza oven?
For this kind of project; yes, as the formula is more suited to be applied in thicker layers.

Can this product be dyed to suit the colour of my oven bricks?
Yes, however – as this is something we have not tested we are unaware how the dye will react with the heat and whether or not it will fade.

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