For what it's worth, I'd say that a foam that is tolerant of high temperature would be needed.  Why would open or closed cell make a difference, if it makes a good, tight seal?  Some open cell foams are more fragile than closed cell foams of the same material.  Of course, this is in a dark environment, so light breakdown, a killer of many plastic foams, is not a problem.  mcneely

---- Mike South <msouth@GMAIL.COM> wrote:
> This is a link someone gave in the archives.  This is what they used to
> replace the foam on the heater flaps:
>
> http://www.homedepot.ca/product/adhesive-foam-tape/941505
>
> (in case that link dies over the years, here are some details that might
> help someone search it out:
>
> TAGO Adhesive Foam Tape
>
> Model: TA78537 | Store SKU: 1000124257
> )
>
> On the right rail on that page there are several references to foam tape
> that is explicitly advertised as closed-cell (e.g.
> http://www.homedepot.ca/product/closed-cell-foam-tape-self-adhesive-weatherstripping/941502
>
> TAGO Closed-Cell Foam Tape Self-Adhesive Weatherstripping
>
>  Model: TA78626 | Internet/Cat: 941502 | Store SKU: 1000113273 )
>
> Is the difference just that one is porous like a natural sponge and one is
> formed of a bunch of closed bubbles stuck together?  I saw a lot of
> recommendations that you use "open-cell foam", so I guess I'm wondering if
> that's the "default foam" :).
>
> mike

--
David McNeely