Hazards of stove gasket cement ?

[hobbitman]

Built a batch rocket heater with a bell. The metal bell radiates heat very well. Did 2 separate burns outside. Brought it inside and have had several burns with no issues. Our smoke detector went off with no present smoke. The detector activates when there are "dangerous chemicals" or smoke. (printed on detector) The only "chemical" used in the build was Rutland stove cement. I mixed with water to make a wet paste. Then used it to coat the inside of fire box and throat. Also cemented the fiberglass rope for the glass window. Wife smells bad fumes. So are there any hazards related to the stove cement ? tube says it contains Crystalline Silica. Any feedback on the use of the stove cement greatly appreciated.

[Dan (Upstate NY, USA)]

Do you have a leak?

What is the heater attached to outside? For draft.

Is your metal bell painted?

[masonryrocketstove]

Also curious if you used any ceramic fiber board or mineral wool for insulation.

Some preformed CFB products have resin binders to hold their shape, and some mineral wool / rockwool batts are coated in mildew inhibitors.

Both are commonly made of phenolic formaldehyde resins which can burn out or offgas fumes at high temps.

[sertus]

I use this company's castable refractory concrete rimpex.net/html/upload/files/Refractory-gunning-mix-RIMPEX-catalog.pdf. During the first 2-3 firings, there was a smell that I would liken to the smell of battery acid. In addition to the concrete, refractory aluminosilicate batting was also placed in the furnace, so I can't be sure which one caused this. After complete drying and baking, the smell disappeared completely. I always do the initial tests in a well-ventilated area - that's one of the reasons.

[hobbitman]

Problem solved ! Thanks for the input. All valid concerns to watch for in the future. 
I mentioned in another post this material I came across I'll call "green foam". In doing testing I found that it was highly insulative  and had no effect to a propane torch for 3 solid min. So I thought "great, I'll use it to make exposed structure". The right and left back wall were made from "green foam". Then coated everything in the burn chamber with furnace cement. All's good for all the test burns. 3 outside, then 4 inside. All of these were done by myself. I'm gone, at work. Someone else loaded the box with wood, started it, let it burn. Bottom line is the right side of the back wall was nocked down, exposing the "green foam". The green foam could not sustain high heat and began to burn or melt, creating the bad fumes !
Lesson leaned: Don't use unknown materials to construct. Educate EVERONE in the house on the use of the stove. Starting over ...