Respirator (1 Viewer)

Oct 7, 2006
What is the best respirator for Iso's? I know that only fresh air supplies like Survivair and Hobbyair are what is really recommended. But outside and with fans, what 3M filter can be used? I know there is one that is 99% ok..

thanks for the help
Feb 27, 2006
God's Country
binks milenium 2000 or 3000 work great.
Oct 31, 2002
Kennett Square
Here is some info re Isocyanates:

Respiratory Protection
Where the potential exists for overexposure to isocyanates, a NIOSH-approved supplied-air respirator with a full facepiece operated in a pressure-demand or other positive-pressure mode should be used.
For increased protection use in combination with an auxiliary self-contained breathing apparatus operated in a pressure-demand or other positive-pressure mode.
Can I wear an air-purifying, cartridge-style respirator for protection against isocyanates?
Air-purifying respirators can be used with contaminants that have poor warning properties, such as isocyanates. However, you must check with the manufacturer of your respirator for specifics.
For example: 3M and MSA have a respirator change out formula for some isocyanates. If you know the airborne concentration in parts per million (ppm), you can calculate approximately how long a cartridge will last.

The best respirator for spraying Isocyanates is probably MSA supplied air. But spaying outside with fans I'd do an MSA full face with a GMC-H cartridge in it and call it good. Double check that cartridge with MSA as they may have something a little better for Isocyanates since it's been quite awhile since I checked.

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