could anyone tell me if clark foam blanks have to be done with polyester or epox?
Clark type blanks (PU) can be done with either. Lots of info on this search away.
they don’t HAVE to be done with polyester or epoxy…but those are the two best options.
Do a clark blank with Poly. It will turn out better looking. Less bubbles, better color coverage, faster wet out, etc. It will be a much more classic look. If you want to use Epoxy, go get an EPS blank. Don’t waste Epoxy on a Clark blank.
My 10 cents worth.
You can use epoxy on Clark foam as stated before. I’ve used it on PU foam to ‘slip’ a couple boards by the wife because the epoxy does not stink like polyester. She smells polyester and she know. Here she comes now. Bye. Mike
NICE.
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You can use epoxy on Clark foam as stated before. I’ve used it on PU foam to ‘slip’ a couple boards by the wife because the epoxy does not stink like polyester. She smells polyester and she know. Here she comes now. Bye. Mike
Either.
Each has its pros and cons.
PE is better for production/profit.
Epoxy is better for end-users.
Epoxy is far less toxic for you and the environment so for a home builder like me its a no brainer.
In the past a few of the clark foam blanks I glassed with epoxy, over time, developed a problem. It appeared as if the foam became compressed leaving the stringer protuding above the foam by 1/16 of an inch both top and bottom.
As much as I like working with RR epoxy (and as much as I dislike poly), I would recommend using the poly. Most of the Clark blanks that I glassed with epoxy ran into major denting problems. I post-cured at room temp so that may have been a contributing factor to the softness/denting problem.
Good luck
Have done a few with no denting problems…both clark and us blanks…gotta love the fume-less glassing, forgiving work times and overall strength…
I have had no significant denting problems with epoxy over poly-u. Keep in mind my sample size of 3 or 4. I glass everything pretty heavy, though,including PolyPooh boards, ie, ‘vomit resin.’ Mike
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In the past a few of the clark foam blanks I glassed with epoxy, over time, developed a problem. It appeared as if the foam became compressed leaving the stringer protuding above the foam by 1/16 of an inch both top and bottom.
foam collapse is 95% foam issue, 5% resin/glass issue.
i have glassed several PU blanks with epoxy resin, and they’re all holding up like tanks. double 6 deck, single 6 bottom + 4-oz deck patch and tail patch. many years of hard riding, and not a dent or ding to speak of.
Soulstice…maybe that is the solution…the boards I had problems with were all short boards with lighter glass schedules. The few longboards I did with Clark foam and epoxy had much heavier glass schedules and held up ok.