What I should do, if I have bad ventilated area (It's cold outside, and i can't work in front of open window. )? I'm looking for a respirator, but I don't know what type I should buy? What kind of vapors I must avoid, if I use casting materials like Slow set 7, all Clear, Flex and Performance (Urethane)?
I have yet to hear of anyone who has been over come by any Alumilite products....I'm sure that if any of their products was an inhalation hazard that proper labeling would be present as well as MSDS sheets being made available. With that being said, purchase a respirator like what is used in auto body repair....automotive paint... the paints that are used in the automotive industry can cause long term respiratory issues if no care is taken in protecting what you are breathing in....I've killed off a few million brain cells by not fallowing my own advise when I was young and dumb. Do a search for "automotive paint respirator" for more information.
I have allergies, I pour right at eye level (I bring my eye down to the countertop level so my mouth and nose are right there) and I don't have any problem with fumes. I would just add a couple of good fans to circulate the air and if you're really worried about fumes, you could pour under a running vent hood like what you would have over your stove. It would take running the vent hood at least as long as it takes for the pour to start to harden up. The fans on the other hand, I would have them running for at least as long as you are in the room. Unless it's possible to keep them running for longer, then I'd have them running for as long as possible - mine are the fans that are running for normal air circulation so they run 24/7.