Since OSHA's respirable crystalline silica standard, cutting, grinding and drilling concrete or masonry stopped being "wear a dust mask if you feel like it" work. Here is what the rule actually requires, what the filter letters mean — and the part most listings skip: required use comes with program obligations, not just a purchase.
In a hurry — the picks (affiliate links — as an Amazon Associate I earn from qualifying purchases; the rule below)
| The dedicated dust half-mask | GVS Elipse P100 (low-profile, replaceable filters) |
| The trade standard facepiece | 3M 6200 half facepiece (medium) or the 6291 kit (6200-size facepiece + 2091 filters) |
| Filters for the 3M: dust | 3M 2091 P100 particulate filters, 3 pairs |
| Filters for the 3M: dust + odor | 3M 2097 P100 filters with nuisance-odor relief, 2 pairs |
| Spray paint, solvents, adhesives | 3M 60921 organic vapor/P100 cartridges, 1 pair (same facepiece) |
The letter is oil resistance (N not oil-resistant, P oil-proof); the number is filtration efficiency (95 = 95%, 100 = 99.97%). For silica and general construction dust, an N95 meets the common Table 1 requirement; a P100 half mask filters more, seals better, and costs less per month once you're past occasional use — which is why the two half-masks above are the standing recommendation for crews that cut or grind weekly. Whatever you buy, the approval to look for is NIOSH — imported "KN95" masks are not NIOSH-approved and do not satisfy a required-use program.
Fits: the purpose-built dust mask — low-profile enough to wear under a face shield or with glasses, replaceable P100 filters, thousands of reviews.
Fits: the trade-standard combination — a 6000-series facepiece (11,000+ ratings) that takes 3M's bayonet filters and cartridges, with pancake P100s for dust. The 6200 is the medium; 3M also sells the small and the large (6300). Buy the size your fit test says, not the one in the cart. Want it in one box? The 6291 kit is the medium facepiece with 2091 filters included.
Both are 3M's pink "pancake" P100 filters — at least 99.97% efficient against solid and liquid particles, oil-based ones included — and both lock onto 6000, 6500 and 7500 series facepieces with 3M's bayonet mount. The difference is a carbon layer.
When to change them: 3M's rule is to leave the work area and replace the filters if they're damaged, soiled, or breathing through them gets harder. There's no fixed month count for dust. The exception is oil mist: where the only contaminant is oil aerosol, 3M says to discard them after 40 hours of use or 30 days, whichever comes first. Keep a spare pair where the masks are stored — a filter that's hard to breathe through is a mask that comes off.
Both are P100 particulate filters for 3M's 6000, 6500 and 7500 series masks. The 2097 adds a carbon layer for relief from nuisance-level organic vapor odors; the 2091 doesn't. For dust alone, the 2091 is the one to buy. Neither is for real vapor exposure such as spray painting, which needs organic-vapor cartridges.
It requires following Table 1 for the task: engineering controls (water or vacuum) always, and a respirator at APF 10 for the tasks and durations where the table says so. Skipping the controls and just wearing a mask does not comply.
It filters more (99.97% vs 95%) and seals more reliably, and a reusable P100 half mask is usually cheaper per month for crews that generate dust weekly. Both satisfy the common APF 10 requirement when NIOSH-approved and fit-tested.
For required use of any tight-fitting respirator — yes, plus a medical evaluation first and a written program (29 CFR 1910.134). Voluntary N95 use has lighter requirements, but silica-triggered use is not voluntary.