Spray foam and steam riser

timbeans78

I am renting an apartment and I noticed the steam radiator risers at the ceiling are plugged with what I think is great stuff expanding foam. I looked it up and saw that this foam is only rated for up to 240F and says not to use with radiators . I heard that steam risers can get to around 220 if working normally. Is this rating for when the foam starts to degrade or does it literally combust at that temperature. I want to know if this is an urgent fire risk I need to worry about or not. Thanks for any help

109A_5

How long has it been there ?

Here is the MSDS or SDS. Not sure if it is current. It appears it is referring to the uncured state.

https://www.fit.edu/media/site-specific/wwwfitedu/facilities/documents/msds-forms/DOW---Great-Stuff-Window--Door.pdf

https://www.greatstuff.dupont.com/content/dam/dupont/amer/us/en/greatstuff-renewed/public/documents/en/great-stuff-consumer-safety-information-43-d100729-enna.pdf

Not sure if radiator pipes require a fire block caulk, or if the gap size is an issue (building codes).