I really need a non-biodegradable, self-sealing, heavy-duty, absolutely
water-tight plasic bag, at least four feet by two feet but I was unable
to find anything like this from any packaging supplier. I figure I can
glue together two sides of a shower curtin but I need an adhesive that
is very secure and water tight. Home Depot did not seem to have anything
like this. Any ideas on what product would work and where to get it ?
I susprct that the OP's requirement of "heavy duty" may disqualify the
"space bag" type things. After all, the OP is looking at something as
as a shower curtain or his do it yourself bag.
A looong time ago, (mid 1980s) when I had less sense, I used to do
serious white water rafting.
A local equipment store around here used to sell big "sea bag" size
plastic / rubber bags that were
sealable at the top through ian ntricate system of folds and "buttons".
These thing were the size of
an old Navy seabag of the kind you saw in some WWII era movies. They
did keep your spare clothes and camp stove and cooking gear dry, even if
you did roll your raft and dump the bag into a class 4 or 5 rapids.
Those were not locally (Portland, OR) mad, but I have no recollection of
a brand name or manufacturer. Theywere not cheap.
Perhaps if there is an R.E.I. store (big outfitting chain) or a Cabelas
(sp?) nrear the OP one of those outfits mayhave something appropriate.
Bags like this are heat sealed not glued.
You would need to find a vinyl glue if you want to glue a plastic shower
curtain together. Even if you found a glue to do this I doubt it would
fulfill your strength requirements. Also, this glue would most likely have
to melt the two pieces together like glue used for PVC drain pipe.
I think you are going to have to look for bags designed for boating like
white water rafting or kayaking.
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