Is High Temperature mortar (like HeatStop 50) okay as a high-temp mortar for my pizza oven?

First and foremost - NEVER EVER USE A HIGH-TEMP MORTAR FROM A PAIL OR BUCKET TO BUILD YOUR BRICKWOOD BOX OR WOOD-FIRED PIZZA OVEN! Unless you are building the Cortile Barile or Cupola and using the pre-mix to seal the oven, then NEVER TOUCH THE STUFF!

It is not designed for BrickWood Ovens DIY Pizza Oven Ktis or the BrickWood Box.

Only use dry / bagged High-Temperature mortars that are NON-WATER SOLUABLE. If you use an Indoor / Water Soluable mortar and it gets wet, it will crumble over time.


Is SAIRBIND an acceptable high temp mortar?
I was told it was, but the bags say “refractory”


Looking at the product specs - It looks perfect.

I just emailed our HWI rep and requested a Spec & MSDS Sheet… but looking at the specs listed on this Amazon page, they look spot on!