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 disapearing epoxy?		  New Topic  Topic Locked
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bear_tm4
Navigator

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USA
143 Posts
Initially Posted - 03/26/2007 :  21:46:47  Show Profile
Ok, I started filling in all the holes, with epoxy....hold on which holes you might ask? Well, I took off every piece of hard ware, on the cabin top I could take off, and cleaned away all the old sealent and other things ran drill thru the holes to clean them out, then mixed up the epoxy, then comeced filling, well, most of the holes filled nicely, as I would have expected, then there were other that just keep drinking and drinking the stuff up, I eventully ran out of epoxy (that was mixed up) and stopped, I am wondering wear on earth the stuff went? Any clues....I looked, and didnt see it apearing anywhere else, so I am stumped...I am thinking of trying again and seeing what I get, but not sure. Thanks for the help (oh might add, I did put tape on the back of all the holes save one, and so figured out where that syringe of epoxy went, and it did fill up after taping bottom of hole......so still )
Cheers
Capt.Bear, C42MKII "Surprise" #998 WK
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Leon Sisson
Master Marine Consultant

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USA
1893 Posts
Response Posted - 03/26/2007 :  23:09:05  Show Profile  Visit Leon Sisson's Homepage
Sounds like you're flowing unthickened epoxy into large voids via gaps in the plywood laminations. I swab the inside of the holes with a coat or two of unthickened epoxy to get good penetration in the wood, then I add enough high strength thickeners that the resin will barely let air bubbles escape while going down into the holes. Using thickeners cuts way down on the rate at which epoxy can escape into hidden voids.

-- Leon S.
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Happy D
Admiral

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921 Posts
Response Posted - 03/27/2007 :  07:39:28  Show Profile
Some of the holes for the stanchions are very close to the gusset molded into the overhead of the inner mold. It's that V shaped lump on the inside you had to work behind to get the stanchions off. That gusset is hollow in some areas. That's what happened on mine anyway.
Dan
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 03/27/2007 :  11:08:31  Show Profile
I think Dan is on the right track... You can't expect that the inner liner or even the deck is perfectly tight to the plywood core in all places. One little gap and your epoxy could be trying to find its way to your bilge (or any local low point). Thickening as Leon suggests is the solution--you want a consistency more like mayo instead of cream. I generally use chopped glass fiber--available where you buy the epoxy. (Handle with care.)
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bear_tm4
Navigator

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USA
143 Posts
Response Posted - 03/27/2007 :  21:07:40  Show Profile
Ok, thanks, I bought some of the west system stuff, but didnt use enough, so next time will put more thickener in,,,,that will help Iam sure. Thanks for the help.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.