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Spray foam

ChrisJ Member Posts: 15,671
Doing some research at work I noticed Dow's spray foam including Great Stuff and their Froth Paks all seem to be rated for 240F service temperature.

Is there any downside to sealing around where steam pipes pass through floors with this? Will it still allow enough movement? Or, will it glue the pipe to the floor?
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment


  • ChicagoCooperator
    ChicagoCooperator Member Posts: 354
    You could use the great stuff for windows which is more flexible if that has the same rating.
  • Chris_L
    Chris_L Member Posts: 336
    I used Great Stuff for this about 20 years ago. No problems with movement. (And since the dead men didn't use pipe hangers on the runouts from the mains in my system, it holds the valve in place if the radiator is disconnected.)