Seeing that tan, crumbly spray-applied stuff on a commercial job site always raises a red flag, especally in an older building like a Brooklyn hospital. When you're looking at textured fibrous material that's been slapped onto the substrate or tucked behind red electrical cabling, you have to assume it's hot untill a lab says otherwise. In these old medical facilities, they used alot of spray-on fireproofing that looks like messy oatmeal. Even if you see modern yellow fiberglass insulation right next to it, that doesn't mean the older spray is safe. I learned the hard way to never trust a visual ID alone. If you're on a renovation, the first thing you shoud do is check the building's asbestos survey—hospitals are required to keep these on file. If the material isn't listed, stop what you're doing and get a bulk sample sent out. It only costs about fifty bucks for a 24-hour turnaround, and it's way better than breathing in friable amosite beacuse you wanted to finish the demo early. Keep a spray bottle of water handy to keep the dust down if you absolutely have to be near it, but honestly, just keep your distance until the paperwork comes back clean.
Tips for identifying hospital-grade fireproofing that nobody talks about
Sep 16, 2026
Last reply: 3 hours ago
4 Replies
I followed that advice on a job in Queens last month where we found some greyish Monokote-looking stuff on the steel beams. I went straight to the facility manager to see the AHERA reports. They showed the floor above was cleared, but our specific section was listed as "presumed." It’s frustrating becasue the paperwork is often outdated or just flat-out missing pages when you're dealing with these old city buildings.
I ended up pulling a small chunk—maybe two square inches—and dropped it off at a lab in Long Island City. It cost me $65 for the rush, and I'm glad I did. Even though it looked identical to the non-asbestos cellulose we saw in the hallway, the lab found 5% chrysotile. The wet-misting tip is a lifesaver; I used a simple 1-gallon Hudson sprayer to keep the area damp while I took the sample, and it defintely stopped the floaters from getting into the air.
Don't rely on the oatmeal look alone. Some of that newer Monokote MK-6 looks just as nasty as the old stuff from the 60s. If you’re working near those red cables, you’re probly in a plenum space where the air moves alot. Better to wait that 24 hours than risk it.
While the previous mention of Monokote MK-6 is pertinent, one must also be hyper-vigilant regarding the potential presence of Cafco D-3 or similar spray-applied fire resistive materials that often exhibit a deceptive, grayish-white granular morphology wich, despite appearing benignly similar to modern perlite-based mixtures, frequently contains significant percentages of tremolite or anthophyllite in older Brooklyn institutional settings. I woud suggest examining the substrate adhesion specifically; if the material is delaminating in large, brittle flakes rather than crumbling into fine powder upon localized mechanical stress, you might be looking at a high-content cementitious binder which, while marginally less friable, still necessitates a polarized light microscopy analysis to definitively rule out mineral fiber contamination before proceeding with any invasive demolition.
If that test comes back positive, you're gonna need a solid lockdown. I swear by Fiberlock ABC Asbestos Binding Compound for any hospital work in the city. It’s a heavy-duty encapsulant that mops up any loose friable bits better than a mist bottle ever coud. I’ve used it on similar oatmeal fireproofing in Queens and it creates a real tough membrane. Just brush or spray it on the area you disturbed so the plenum air doesn't start moving fibers around the ward. It's cheap insurance while you wait for the full abatement plan to get approved.
Quick update—checking those AHERA reports was a lifesaver, but we found a section listed as 'presumed' that looks like the Cafco D-3 mentioned. We’re holding off on demo untill the lab results hit. If it’s positive, has anyone here used Fiberlock ABC around active hospital vents? I’m concerned about the odor spreading to the rooms next door.
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