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Old 04-30-2012   #1
 
jackson, Wyoming
Paddling Since: 2011
Join Date: Jun 2011
Posts: 14
Leaky raft but can't find a puncture!

Hi all. I have an older 14' hypalon boat with a standard floor. I have found and patched a number of punctures and have replaced all the old patches (there were many). However, the stern is deflating over a period of 3 or so days. the front of the boat seems to stay inflated, or mostly so. i have done the soapy water thing inside and out, including the valves, ad nauseum. it's actually become quite frustrating. anyway, i'm wondering if there are any other tricks i have not tried? any help would be great!
just trying to get another season or two out of this boat!

Thanks!
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Old 04-30-2012   #2
 
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portland, Oregon
Paddling Since: 1991
Join Date: Apr 2011
Posts: 2,119
You check the valves?
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Old 04-30-2012   #3
 
welch, Oklahoma
Paddling Since: 1976
Join Date: Apr 2009
Posts: 207
Mix a little dish soap in you water that is the easiest really shows up the air leak
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Old 04-30-2012   #4
 
jackson, Wyoming
Paddling Since: 2011
Join Date: Jun 2011
Posts: 14
re:

yes have checked valves. i've even poured flex-seal (from NRS) into the tubes to fill any pinhole leaks. i will replace the rear valve today. i have a strong suspicion that's whats leaking even though it's not obvious. so yes have done the soapy water thing to death. anything i haven't tried?
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Old 04-30-2012   #5
 
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portland, Oregon
Paddling Since: 1991
Join Date: Apr 2011
Posts: 2,119
If its really slow you wont see much with the soapy water other than an accumulation of tiny bubbles across the surface only after a few minutes. If its spread uniformly across the whole chamber that can be a problem as nothing will be obvious. Did you slosh around the flexseal everywhere until it cured? (not sure if those are their instructions)
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Old 04-30-2012   #6
 
Riverton, Utah
Paddling Since: 2005
Join Date: Jul 2011
Posts: 248
I use bubblebath instead of soap, it doesn't get all foamed up as easy as soap does.

If it deflates over 3 or so days, and its an old hypalon then I say you are good to go. . Seriously, if it takes that long to show decreased air its going to be near impossible to find the leak.
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Old 04-30-2012   #7
 
rgAHOLE's Avatar
 
Farmington, New Mexico
Paddling Since: 2000
Join Date: Jun 2010
Posts: 34
Did you try buying a kayak? Those don't suck as bad.
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Old 04-30-2012   #8
 
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Lakewood, Colorado
Paddling Since: 1989
Join Date: Jun 2008
Posts: 1,162
Last ditch effort... fill it with water. Not the best solution but it will show the slowest of leaks. I've never heard of anyone doing it on a raft, though.
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Old 04-30-2012   #9
 
Eagle, Colorado
Paddling Since: 1996
Join Date: Apr 2005
Posts: 139
Probably just pinhole leaks all over.

As long as it's not going soft evey couple of hours, I would just pump 'er up in the morning and call it good.
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