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Topic: What chemicals are in butyl flashing tape, EPDM compatible?  (Read 2888 times)

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Offline EPDM_crisis

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What chemicals are in butyl flashing tape, EPDM compatible?
« on: September 05, 2012, 02:16:21 AM »
Hi guys, sorry if I have asked this in the wrong section..? I just joined here as I spent several hours/days searching for a safe adhesive to use on EPDM pond liner, and couldn't find the answers anywhere.

So which chemicals are in butyl flashing tape? Butanol? Butylene? Something else?

I've been told it is fine to use on EPDM but have learnt it's always a good idea not to be too trusting or some peoples opinions.

If the tape contains butylene it is apparantly disastrous lol.

Thanks for any genius insight on the matter!!

Offline jaspevacek

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Re: What chemicals are in butyl flashing tape, EPDM compatible?
« Reply #1 on: September 19, 2012, 11:50:10 AM »
EPDM is pretty inert stuff. I've not worked with butyl flashing tape, so I' not entirely sure about its composition, but from what I've read, it is a butyl adhesive, which means it is probably made from polyisobutylene and some tackifiers. It's the tackifiers that I would worry about, as they could leach from the adhesive into the EPDM, softening it.

What is the application here?

Find a good adhesive for EPDM will be a problem as it is low-surface energy material and crosslinked to boot.


Offline Enthalpy

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Re: What chemicals are in butyl flashing tape, EPDM compatible?
« Reply #2 on: September 19, 2012, 03:47:15 PM »
Adhesive on EPDM is difficult. Could you use a hot glue gun instead? This makes very strong joints - including on polyolefines - and is easy to use.
http://en.wikipedia.org/wiki/Hot_glue_gun

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