PU foam and PVC

[Tricky Dicky]

Does PU foam react with PVC? I have a hole with a cable passing through it that I need to fill and it would be handy to use PU foam.

Richard

[Bill Wright]

To be on the safe side wrap bacofoil around the cable.

Bill

[spuorgelgoog]

AFAIK no, but it affects the thermal characteristics of the cable.

Polystyrene, OTOH, apparently does react adversley.

Owain

[Brian Gaff]

Virgin seem to have used some kind of silicon Sealant where their cable comes through the wall. Brian

[Tricky Dicky]

I know that PU foam does not affect uPVC but with cables using a more flexible type of PVC I was just wondering if it has the same effect as polystyrene?

The hole I am trying to fill without making a job of it is a ceiling hole where previously a rosette was. Although the lamp fitting I am putting there will cover the hole there is still a layer of the original vermiculate insulation below the rock wool and the stuff seems to fall through even the slightest of gaps especially with a bit of wind!

Richard

[spuorgelgoog]

I hope not as

I've squirted all my ceiling cable entries in similar circumstances.

Owain