I think you can read between the lines here. i had on a typical n95 mask while doing a little demo. I didn't have raised suspicions about there being asbestos in the walls, as i already researched my home's primary wall material prior and it's not prone to the stuff. But, after removing a few SF of board i noticed a different breed, and the label is "national gypsum company" "fireproof GYPSUM W..." label cuts off. It's the fireproof part that raised my red flag. I bagged what i took off, cleaned the area, and am sending a sample off to a lab for testing.
My throat was a bit dry after the work. don't know if i'm overthinking, but in googling around, pretty much the only thing people will tell you is to not use n95 for asbestos. Great and all, but my question is whether n95 provides ANY protection? Looking at the micron sizes of asbestos and the filter, it would seem it should filter them, so is it catching 95% and obviously for this hazardous material you want that extra 5% covered, or do these fibers penetrate n95 material?
According to CAL/OSHA the N-95 does not provide protection against asbestos.
Q: What is an N95 mask? A: An N95 mask is a disposable filtering facepiece respirator with two straps. When worn properly (with the mask making a tight seal with the user’s face), it can protect against hazardous airborne particles. N95 masks do not protect against gases, vapors or asbestos, and they do not provide oxygen. The “N” designation means the mask is not resistant to the effects of oil mists. For instruction on using filtering facepieces, see Using Disposable Respirators in English and Spanish.