This is from a commercial building where I'm trying to facilitate replacing what you see in the pic. They want the gaps filled in where this stuff is missing.

It mostly covers metal surfaces like beams, and found mainly in the stairwells. Any help on what it is, or where I can get it would be appreciated. Thanks!

 

I believe the technical name is shotcrete. But it could possibly be a similar product with fireproofing (firestopping) qualities. In a pinch, for touchups, I bet you could mix up some Portland or Stucco base mix and blow it on with a drywall texture gun and air compressor with the gun on the largest setting and it would probably blend in okay. For a small area, that is.

I'm actually going to be trying this on my foundation in a few months, to fix some textured areas where the parging has come off.

But in a commercial setting if this sort of repair work needs to be done by someone who is "certified", you might have to contact a professional to have it done. A fire equipment company might have some sources/leads on who might do that type of work in your area. Certain things like penetrations in commercial buildings need to be firestopped in a very particular way, with rockwool, and sealants that are rated for use in firestopping. Certain silicones, intumescent sealants, ablative sealants. High grade stuff not commonly available in your average store... except for your run of the mill fire rated silicone.

 

It looks like a mineral fiber fire resistant coating. Usually it is somewhat soft and easily damaged and relatively easy to remove. It is not sold in big box home centers and I've only seen it applied to commercial structures to improve the structure's fire survivability (or at least buy more time for everyone to get out of the building). If you search for "commercial spray on fireproofing for steel" you will see some options that might work for you. Or, depending on your location, see if a professional in your area can do the repair.

 

Thank you both! This will get me started on getting on the repairs.