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Expanding foam and PVC cable

JDW

Does expanding spray foam (the stuff that comes in cans for gap filling) damage PVC cable?


I have a small section on my ring main which is in contact with it, unfortunately I cannot access it as its under the shower tray!




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    Yes Z thet is called stress corrosion cracking, any solvent will do that and petrol contains benzine which dissolves lots of plastics, and it very effectively removes the plasticiser from PVC.

    I wold not expect that cured foam would affect PVC, anyway as you are not moving it around it won't cause failure. It is the foaming agent in expanded polystyrene that damages PVC.
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    Yes Z thet is called stress corrosion cracking, any solvent will do that and petrol contains benzine which dissolves lots of plastics, and it very effectively removes the plasticiser from PVC.

    I wold not expect that cured foam would affect PVC, anyway as you are not moving it around it won't cause failure. It is the foaming agent in expanded polystyrene that damages PVC.
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