In the process of finishing my smoker (will post picks when done) and noticed due to my lack of experience welding that I have some bends in the firefox door and chamber door that makes some gaps when closed. Usually the gaps are around 1/8" but I do have some areas were it is around 1/4". I welded in some toggle clamps so that should help with the small gaps. However, I am wondering if anyone uses the red high-temp RTV sealant that you can get at the local auto store. I've heard some people use the red, some use the copper. I think the copper type is low voc/non-toxic. Anyone have luck with this and haven't killed themselves due to toxicity issues?