Expanding Foam

MikeyB

Hey guys, anyone have any info on Expanding foam products such as Dow "Great Stuff" Polyurethane foam being safe for use of sealing/firestopping penetrations around any kind of Pex or Pex Al Pex tubing, wondering if this product will attack the Pex in any way, thanks for your help.

[Deleted User]

look down here

http://forums.invision.net/Thread.cfm?CFApp=2&Thread_ID=63417&mc=18

MikeyB

foam

Thanks Mike, but I cannot seem to access that thread

bb_11

Foam

There is a foam made for high temps. Can't remember who makes it, but the supply house should have it.

I don't think Great Stuff can handle the high temps.

You may want to look @ DAP. They make a low temp spray that is a lot easier to work with. It cleans up easier too. Don't get the Great Stuff on you skin. It does not want to come off.

Good Luck.

MikeyB

DOW

Thanks bb, I will check out the Dow products, i have used the great stuff before but never on pex style tubing, would like to use it in the future for both pex domestic and pex heating applications

Jamie Hall

shouldn't

attack PEX. But it Great Stuff and things like it are not firestops at all. There are special foam in place things for that. Any good supply house should have them.

k_2

re

bought some of that stuff and it burns as well as anything, if you are really worried use the regular intumescent caulk.

I was surprised, burned as easily if not more than blue foam.

[Deleted User]

can't access that thread?

copy and paste it into your browser window. i just checked it and it worked. or, scroll down 20 or so subjects and look for; Sprayed Foam over PEX in heat distribution plates...good idea? that's what the link connects to

Andrew Hagen_2

Hilti

Hilti Fire Foam

MikeyB

foam

I think that Great Stuff just came out w/a fire proof expanding foam, its at the Depot

scrook_3

not much should hurt PEX

chemically, but if you need firestopping at a minimum look at fire stop rated foams (e.g. the Hilti material cited below), and some fire codes may require an intumescent fire stop material, which will swell in fire conditions, closing the breech made when the PEX melts or burns away.

scrook_3

Thd titled...

"Sprayed Foam over PEX in heat distribution plates...good idea?"

March 18, 2009

[Deleted User]

not much should hurt PEX chemically,

but some foams are exothermic and can reach 200+degs, so the high temps may damage the surface and weaken it

MikeyB

Hilti

I have used alot of the Hilti material alot in the past, bricks, caulk, etc, all work great, I love their tools as well

kpc_71

Depends on....

what your application is. In most residential apps they say fireproofing but really mean smoke proofing. A wood structure is pretty hard to fireproof.

Ray_14

Dow does make a code approved flame retardent foam. My wholesaler carries it. It comes out orange. You have to buy a hand gun and a can of spray cleaner with it.