What doesn't Expanding Foam stick to ?

[Andrew Mawson]

George,

Yes it was for ventilation originally when it was a cow barn, but my CNC machines don't fart as much as cows :)

Andrew

[Bob Eager]

I have this vision of a farmer having a cowshed like this, with the ventilation led to a vertical pipe in the corner and a permanent 'flare' as on an oil rig.

[dec]

so expansion foam does NOT stick to cling film?

so is that the best way to stop it stic king to the mold framework?

[dec]

would a silicon spray work do you think?

[dec]

[dec]

here is a link to a home-made solution from previous Google link. this solution (pun intended) was mentioned elsewhere too.

[Brian Gaff]

Are you sure it sticks to anything? I thought the whole idea was to expand into voids, and seal up the hole. Brian

[SteveW]

It is horribly sticky and sticks to almost anything. The low-expansion version is used as an adhesive - bonding plasterboard to walls and the like. Get it on your jeans and you'll forever have a pair of jeans with a patch of hardended foam on. Get it on your skin and, unless you use a solvent, it'll take days to get it off.

[alan_m]

The solvent doesn't work once the foam is cured.

[Animal]

I believe it only comes off as the skin's surface is shed with it. Polythene is one of the least stickable materials on the planet, might be worth trying.