Firewise® Hotspot Ready to Use Mortar


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  • Ideal for setting firebricks, installing and repairing fireplaces, chimneys and BBQs.
  • Designed for replacing and/or repairing fireplace bricks.
  • Ensures smoke and gas tight joints.
  • Easy ready-to-use mortar.
  • Air-dries in 24 hours.
  • Heat resistant to 1400 degrees C.
  • Sandstone colour.
  • Coverage: Approx: 500g tub = .25lts = 250cm³
  • Australian made and owned (Certificate)
  • Available sizes: 500g, 1kg & 4kg Tubs  (35kg Made to Order)
  • Shop in New Zealand CLICK HERE
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Firewise® Hot Spot Ready to Use Mortar is ideal for setting firebricks, installing and repairing fireplaces, chimneys, fuel stoves and barbecues.
Suitable for use outdoors, must be kept dry for the first 24 hrs. For larger repairs use Firewise® Instant Brick Castable Cement.

Additional information

Weight N/A
Dimensions N/A

35kg, 4kg, 500g, 1 kg


  1. Clean the area to be filled/fixed, removing any loose material and dust.
  2. Mix thoroughly until even consistency is reached.
  3. Wet area to be repaired with water, and then apply with a trowel or suitable tool.
  4. Allow 24 hours to dry.
  5. Keep lid tightly closed and store away from heat when not in use.


What temperature is the product effective to?

How long after applying product can I use my heater?
Hot Spot Ready to Use Mortar requires 24hours to air dry. You can use the heater after that.

Is hot spot ok for use on an outside BBQ?
Yes, Hot Spot can be used if it is cured and dried. Protect from rain/moisture for 24 hrs until curing process is complete. It is not as strong as instant brick.

What is the difference between Hotspot and Black patch?
The colour.  Hot Spot is a sandy colour, while Black Patch is black.

Is Ready to Use Mortar suitable to repair a smashed up fire box in a Kamado Cooker?
Yes in principle it should hold all the pieces together, but we have never tested our product in this situation.

Is Hot Spot Ready To Use Mortar suitable for outdoors?
Yes, providing that it is fully air-dried for at least 24 hours prior to getting wet.

Can this be used to render my pizza oven?
It can be used as ‘render’ per say – this cannot be applied too thick as it can crack. We really recommend our Instant Brick for this kind of project as the formula is more suited to be applied in thicker layers.

The liquid on top of the Hot Spot has leaked on my porcelain tiles and has left a mark, how do I get it off?
This liquid sets once its exposed to air/ heat – so there is no physical way of removing the product – what can be used to lighten the effect is Jif cream as it has a cutting agent in its formula (a test on an inconspicuous area is recommended prior) or a magic eraser.


Customer Reviews

Based on 1 review
Great product

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