According to Dow Chemical, it's closed cell. If it were open cell, then it'd probably fail pretty quickly. A closed cell foam should resist water pretty decently.
It's unlikely that anything will be a permanent seal... > -----Original Message----- > From: [email protected] [mailto:hardware- > [email protected]] On Behalf Of [email protected] > Sent: Wednesday, July 21, 2010 7:38 PM > To: [email protected] > Subject: Re: [H] Insane method for protecting an ethernet join in a hole > ofwater > > I had mentioned great stuff but someone aserted it was porous. I had > suggested a piece of pvc and using that at both ends > > Sent via BlackBerry > > -----Original Message----- > From: "Greg Sevart" <[email protected]> > Sender: [email protected] > Date: Wed, 21 Jul 2010 19:22:49 > To: <[email protected]> > Reply-To: [email protected] > Subject: Re: [H] Insane method for protecting an ethernet join in a hole of > water > > Interesting idea, but I'd confirm that the Crisco is really non-conductive. > Being essentially a fat, it would also decompose over time. > > You could also consider trying a closed-cell expanding foam (ie: Great Stuff) > or silicone... >
