Steamroller
Gerry Lopez status
Reged: 12/23/07
Posts: 1317
Loc: 48U - Green River, WY
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wanna see what happens when you use old school polyester resin to fix a new school EPS/epoxy board?...
what started out as a minor fin box crack became a major repair because i was...stoopid...within 3 min of applying a little bit of resin it melted both the foam and epoxy....FAST...
paint on some resin...uh oh...why is it fissling and where the hell are all these bubbles coming from???...oh CRAP its MELTING...QUICK...wipe it all off and shopvac it outta there!!!
after 1 min...
after 3 min....
the worst part is 2 days later its STILL melting...
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quit yer bitching...just get out there and...RUN WHAT YA BRUNG!!!
Edited by Steamroller (01/11/10 03:11 PM)
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groovn
Rabbitt Bartholomew status
Reged: 01/16/02
Posts: 9808
Loc: The North Coast
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damn!
I nearly did exactly that a couple months back. Thank god I didn't!
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~groovn lives~
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Anonymous
Unregistered
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Did you not know it was eps?
...and then you shop-vacced hot resin!!??
Edited by bobblehead (01/11/10 03:44 PM)
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grundy
Legend (inyourownmind)
Reged: 12/16/05
Posts: 341
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Quote:
after 1 min...
well, at least you had your camera handy and didn't miss the photo op...
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royallen
Billy Hamilton status
Reged: 01/30/09
Posts: 1657
Loc: the swamp
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Quote:
Did you not know it was eps?
...and then you shop-vacced hot resin!!??
The shop vac probably made some cool noises just before it quit working.
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Everything you know is wrong
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walrus
Gerry Lopez status
Reged: 04/01/07
Posts: 996
Loc: NJ
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not too much you can do with this but dig all the damage out and back fill with filter filled epoxy and boy! will that make for an unbalanced board! this is why they put thoet labels on the board to tel lyou that they are eps/ epoxy built. al very long time ago i tried to glass a sytrofoam board --(the blank was a slab of commerical insulation )with a poly resin and watched it dissolve onto my workroom floor. fellow later told me it would have worked if i had painted the foam with latex paint to act as a barrier.
well, good luck
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if your not having FUN, get out of the water!
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rogerbeal
Legend (inyourownmind)
Reged: 05/11/06
Posts: 541
Loc: crow point u.s.a.
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Now you need to fill that with a "SLOW" epoxy or you're going to have a bigger hole. 
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surfthis
Legend (inyourownmind)
Reged: 04/18/02
Posts: 429
Loc: lefts off the reef
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You learned your lesson. Now here's some advice. Draw a line along the inside edge of the fin fore and aft of the fin on the bottom of the board. Put a dot where the back of the fin is. Take out the fin box. Rout out a hole that gets rid of all the bad area eaten by the PE resin. Now cut a chunk of EPS foam to fit the routed area. You can stick this in with Sumo polyurethane glue (dries white), or some slow kick epoxy with cabosil. After it sets, sand flat flush with the bottom of your board. Now use your lines to rout out for the replacement box, glass over when that sets, fill coat, then sand flat. Add more resin if you want a smoother finish.
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hackeysaky
Miki Dora status
Reged: 12/19/02
Posts: 3822
Loc: NJ
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WTF were you thinking?
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Sorry I'm late... there was trouble at the lab with the running and the exploding and the crying...
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GDaddy
Phil Edwards status
Reged: 01/16/06
Posts: 7105
Loc: Carlsbad
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I hope you're not planning on using resin + filler to fill that sucker.
The way I'd handle it is to rout out the bad stuff, cut an insert of fresh foam to fit and use Gorilla Glue or Sumo to glue it in, shape it to fit the board and then reglass over it. Then install the new finbox over that. I'd seriously consider using a higher density EPS or PU foam for the repair.
P.S. EPS flakes into little beads when you cut or sand into it. It literally does look like styrofoam cooler foam. If you're looking you can't miss it. OTOH, XPS is a little more tricky.
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squeekie
Michael Peterson status
Reged: 04/27/06
Posts: 2127
Loc: Capistrano Beach,CA
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Ever seen a gas can made of Styrofoam???
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Ward, weren't you a little rough on the Beaver last night?
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BUMFIGHTER
Grom
Reged: 01/01/10
Posts: 30
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You've done your part....now take it to a professional.
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marksam
Michael Peterson status
Reged: 02/17/02
Posts: 2061
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I learned that lesson a very long time ago when I used a styrofoam cup to mix resin for a ding repair. After I mixed the batch I went to taping off the ding. I turned back to grab the resin and the cup had melted leaving resin dripping down the bench and onto the floor. First and last time I made that mistake.
Like a few others said, cut it all out and repair with a plug of foam. Or take it to a pro and write it off as a lesson learned.
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"I have to return some video tapes"
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