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kebwi 10-05-2009 11:40 PM

AO Safety 95090 respirator
Simply and straight-forward question. Is the AO Safety 95090 a good respirator for:
  • Cutting fire brick, and/or...
  • Installing InsWool?

As applications, it lists, somewhat generally: paint and pesticide chemicals, chlorine and muratic acid, lead, asbestos and mold abatement, lacquer and enamels.


nissanneill 10-06-2009 05:01 AM

Re: AO Safety 95090 respirator
I would think that one of those simple mouth and nose masks would be adequate rather than an elaborate and cumbersome respirator. After all, the particles that you are preventing from inhaling are coarse and not gaseous like paint and pesticide chemicals, chlorine and muratic acid, lead, asbestos and mold abatement, lacquer and enamels!
If you use the water on your saw, then you should not get any dust, only mud!
The fin insulation particles will not penetrate the fabric of the mask. They are a lot easier to work with than a respirator, unless it is cold, you wear glasses and they keep fogging up!


kebwi 10-06-2009 07:43 AM

Re: AO Safety 95090 respirator
Oh, maybe I had it backwards. I was concerned when this mask (and lesser versions of the same concept) listed asbestos but specifically didn't list whatever these insulation boards are made out of, ceramic fiber or something like that.

...and I suppose I have no idea how large fire brick dust is.

Any other opinions? This s a good topic to hash out, maybe even sticky (with a more general thread title I suppose) assuming people know or care.

egalecki 10-06-2009 07:45 AM

Re: AO Safety 95090 respirator
I think the regular mask will be fine for most of what you're doing on the oven. You could spring for a drywall-style mask if you want- they're a bit thicker and fit a bit better, although they tend to make me feel like I don't have enough air...

You also really need eye protection. I was trimming a piece off a brick with the angle grinder and a tiny chunk flew up and hit me on the cheek. If I hadn't had eye protection, and it had been a smidgen higher, I'd have one functioning eye. That piece was red hot and burned me- and it really was tiny- about half a grain of rice sized.

Your ears (and those who speak to you) will appreciate ear plugs too...

dmun 10-06-2009 08:50 AM

Re: AO Safety 95090 respirator
I used this 3M unit:

MSC Item Detail

A proper respirator will let you breathe freely, it has a valve to exhaust air so it doesn't get so sweaty and smelly.

RTflorida 10-06-2009 04:39 PM

Re: AO Safety 95090 respirator
Mine looks like dmuns.......just a bit more abused. I find the cheap masks to be a pain, they don't seal well around your face, they clog quickly - leaving you gasping, and really don't agree with heavy sweating induced by 95 degree heat and 70% humidity. I think I paid about thirty bucks for my respirator about ten years ago (so the current price listed on dmuns link is pretty good). I think I have replaced the cartridges twice (around $12 each time). A bit cumbersome? yes. better? considerably.


ThisOldGarageNJ 10-06-2009 05:57 PM

Re: AO Safety 95090 respirator
a good respirator is a good investment for your health, I have read articles recently stating that sawdust can be considered a carcinogen because the fine dust settles deep in your lungs, Anyone who has ever cut a bunch of purpleheart on a table saw can testify that their lungs hurt after,,, I have a medium duty mask for most stuff and a MSA full face I use when cutting exotic woods, pressure treated, etc,, its uncomfortable but worth it.. cost was around $ 200.00 but i am lucky that i work for a police supply company and my boss gifted it to me

RTflorida 10-06-2009 08:49 PM

Re: AO Safety 95090 respirator
Mark, I have only worked with purpleheart one time (about 20 yrs ago, before I knew better or cared). My daughter was just starting school and my wife suggested I build her a desk she could grow up with. Of course her favorite color was purple and dad just HAD to to search out and pay dearly for the lumber........I still remember the asmatic symptoms that lasted for days. I also found out (around the same time) that walnut dust does not agree with some people (me). Just another reason why I have the above mentioned respirator.


ThisOldGarageNJ 10-07-2009 03:25 AM

Re: AO Safety 95090 respirator
Black walnut can not be used in bedding for horses, Its known to irritate them as well,, Im paying now for the years of not wearing a respirator,,,, But as they say "better late than never"

egalecki 10-07-2009 05:17 AM

Re: AO Safety 95090 respirator
it's not just the horses' lungs, it's their feet. Walnut shavings make them founder, which is, loosely, when the bones of their feet sort of rotate and drop through the bottom. Not a good thing when you weigh upwards of half a ton.

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