Curing heat stop(dry mix) refractory mortar on fire bricks on outdoor fireplace?? Do I cover with plastic and mist like the other mortar I used on the CMU?

When I learned about the refractory used in blast furnaces they had to install the brick while there was a lot of heat(dressed in commercial body gear),the refractory was applied outside the doors(on the firebrick) then cured in the heated atmosphere.

What does the packaging say?Dry or moist?

Hot or ambient temp cure?

Quote:

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Originally Posted by KBC

When I learned about the refractory used in blast furnaces they had to install the brick while there was a lot of heat(dressed in commercial body gear),the refractory was applied outside the doors(on the firebrick) then cured in the heated atmosphere.

What does the packaging say?Dry or moist?

Hot or ambient temp cure?

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It's heat stop and all it says is to mix with water!

If you leave it to dry in the open air,curing in real time,what would be the worst case scenario? It cracks?If it did,you would only have to take out the cracked areas and tuck-point those spots.

Adding moisture(spraying),worse case scenario?too long a cure and a soft mortar?Requiring a heat source to fully cure.

Not sure.I guess I would try the regular air dry,perhaps some misting but not too much..

Just my opinion.

Quote:

---

Originally Posted by KBC

If you leave it to dry in the open air,curing in real time,what would be the worst case scenario? It cracks?If it did,you would only have to take out the cracked areas and tuck-point those spots.

Adding moisture(spraying),worse case scenario?too long a cure and a soft mortar?Requiring a heat source to fully cure.

Not sure.I guess I would try the regular air dry,perhaps some misting but not too much..

Just my opinion.

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I guess I'll find out when I use the fireplace this winter!
Thanks,
Patty