Mapei Mapeflex Firestop 1200°C High Temperature Grout Grey 300ml Product Code: 25153

For rigid seals in voids and joints between materials that come into direct contact with flames or need to withstand temperatures up to 1200°C. Suitable for industrial furnaces, wood burning ovens, barbeques, chimney flues and fireplaces.


  • Odourless
  • Solvent-Free
  • Accommodates Movement of
  • Rapid Drying
  • Suitable for Materials in Direct Contact with Flames
  • Ideal for Pre-Manufactured Elements


Covers 3m per 300ml.
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Safety Data Sheet
Additional Information
Technical Specification
  • Brand : Mapei
  • Sealant Adhesive Volume : 300 ml
  • Product Type : 1200°C High Temperature Grout
  • Model Name : Mapeflex Firestop
  • Volume : 300 ml
  • Colour : Grey
  • Pack Size : 1
  • Manufacturer Guarantee : 5 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


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€12.95 Incl. 23% VAT

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Mapei Mapeflex Firestop 1200°C High Temperature Grout Grey 300ml is rated 3.8 out of 5 by 27.
Rated 1 out of 5 by from Not as good as expected Lumpy from tube, dries crusty, cant see this being flexible judging by the way it dries.
Date published: 2018-05-07
Rated 3 out of 5 by from Very messy Really good stuff, resealed the lid on our wood burner, really messy stuff. The worst thing about this stuff is you squeeze the trigger on the gun and nothing comes out, squeeze again and nothing, do it again and then it flies out everywhere!! Could not get a constant bead out of this, gave up in the end and put it on my finger and applied it by hand!
Date published: 2018-01-01
Rated 3 out of 5 by from Good for sealing stoves Looks like a great product. Was a bit lumpy so hoping it lasts.
Date published: 2017-12-20
Rated 4 out of 5 by from Fire flue repairs The firestop grout was easy to use, it was more flexible than I had expected but this made it easier to work with. The finish was good and it was easy to clean off the excess. It dries darker than it initially looks.
Date published: 2017-10-02
Rated 5 out of 5 by from High Temp Grout Easy to use and apply. Not cheap but will hopefully do the trick. Used to replace old cement around wood burning flue, which never lasts long before cracking and falling off. This grout was recommended by our chimney sweep, who uses it all the time. Let's see how it performs once the fire is lit ?
Date published: 2017-08-17
Rated 5 out of 5 by from Better than Fire Cement! Great stuff to use, bit pricy but worked a treat reconnecting our wood burner. A word of caution it's pretty runny, more like toothpaste than silicone! Easy to apply and seems to do the job a lot easier than traditional fire cement, thicker bits cured after a few hours and we'll see how it performs once the burner is fired up again!
Date published: 2017-07-17
Rated 5 out of 5 by from Great Product Used this grout on my bbq to seal angle iron which holds my smoker lid. Dries rock hard after 24 hours and works perfect, easy to apply and easy to clean after use. I am very pleased with this product and would definitely recommend.
Date published: 2017-06-22
Rated 5 out of 5 by from Brilliant Stuff Both of the firebricks in my woodburner had broken in half. Went to Screwfix and bought a cartridge of this stuff.Removed bricks and applied a good bead to each edge then squeezed bricks together and replaced them. Scraped off excess with knife. It states curing time of 24hrs, i was cold so lit fire after 6hrs without any issues, no movement no cracks, nothing.4 days have no passed and still good.
Date published: 2017-01-13
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