You can get a clean seal with this respirator really easily, but not with a beard, not even a goatee, not even once it's tightly trimmed. I tried it all. For me the will to fix our bathroon ceiling trumped the hairs dancing around my mouth and chin, at least temporarily, thus I shaved. Post shave this thing is airtight and I am comfortable. The venerated goatee will grow back, lungs don't. The canisters cover most nasty stuff you may encounter, up to and including mold and asbestos. Be smart: wear a long sleeve shirt, gloves, airtight eyewear, and earplugs.
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