Hey guys i was wondering if any of you knew how much epoxy i would need for a 5’8" fish and a 7’2" funboard? can you tell me how much epoxy per board? also, if any of you have Greg Loehr’s contact info can i please have it? Thanks, Cam
Lot’s of good info on this thread about epoxy, including amounts of resin to use:
http://www.swaylocks.com/forum/gforum.cgi?post=242323
Also, go to resinresearch.net for specifics about their epoxy.
Hope this helps!
Pat
I use about 24 ounces total for between a 7' and an 8' board. I normally have some epoxy dings to fill just in case I have any left over. Remember, if you don't mix enough to finish, just go back and mix a smaller batch, it's not an issue with Epoxy, at least not in my experience. For 9' to 9' 6 boards, I can usually get the job done with 28-30 ounces depending on how long I cut my laps, and I tend to cut pretty long.
Hope that helps you some!
Hello Novasurfer316 ,
My plan was to keep a record of how much resin I used on different boards but I never followed through. We did a long board this weekend and used 30 oz per side to laminate. Got away with 15 oz per side on the hot coat but that was really streching it out.
I have notes from a 5’10 fish.
6oz cloth bottom used 15 oz resin. 2x6oz cloth top used aprox 18 oz resin. Hot coat 15oz bottom , 15 oz top. That was too much resin for the hot coat. 10 oz should work for hot coat on a board that small.
I’m mixing my Resin Research epoxy by volume per Greg L at the Cerritos College seminar in Dec 2005. I use PPG mixing cups that I buy from the autobody supply store.
Happy glassing!
Ray
This is a helpful post I go by. I forget who posted it, it was one of the pro guys though :
" 4. We use VERY little resin. Below is an example
of our use levels for different size boards. As there
is no “gel” time, any resin left over can be used on
the next board. If you run short, you can easily mix
up additional resin to finish with. Usually we just work
out of one bucket and simply keep mixing more materia
l as needed. It isn’t the same, “this bucket for this board,” as polyester.
These are estimates for total mixed material.
6’ and under - 9 -12 oz. bottom 12-15oz. deck
7’ and under - 12 -15oz bottom 15-18 oz. deck
8’ and under - 18 - 21 oz bottom 21- 24 oz. deck
9’ and under - 24 - 27 oz bottom 27- 33 oz deck
Hot coats run just a bit more than an ounce per foot.
For instance, a 6’ board would take about 7 oz. per
side. Longboards, 9’, take about 12-15 oz. per side.
If you’re glossing use a bit less than a hot coat."
alright let me clarify… first i do the laminate coat… then hot coat and then gloss coat? please correct me if im wrong and explain the difference in each of the coats… thanks
what is gel time?
Laminate both sides of the board with the usual steps in between. Hot coat the board. If your going to be polishing I believe the general consensus is to sand your hotcoat to 150 grit. I know stuff all about polishing but anyway. Then apply your gloss resin. Then sand and polish. Easy eh? Actually no, not really. Gel time probably applies more to polyester resin than epoxy as epoxy just gets thicker and thicker after a certain amount of time.
Polyester just turns from liquid to jelly after a certain amount of time and then continues hardening. How much time is depends on whether you are using slow or fast hardener for your epoxy. Your epoxy should also have a “pot life” specified.
This is generally the amount of time you would have to work with the resin before it gets too thick (epoxy) but it can vary according to the temperature of your working environment.
As for the differences between the three, laminating refers to placing fibreglass on a shaped blank, cutting the lap in, and then saturating the cloth with resin. I read somewhere that resin and fibreglass is four hundred percent stronger than resin alone for your information.
Once you finish laminating both sides of the board there should still be weave exposed with resin in between the weaves. In other words the resin doesn’t fill the fibreglass all the way to the top. It would be nice if you could fill the glass all the way to the top with epoxy but that’s another story.
This is where fill coating (hot coating) comes in. Hot coating gets it’s name from polyester resin and the amount of MEKP (catalyst) that get’s added to it which is quite a bit. This can generate quite a bit of heat. Hence the term hot coating.
Hot coating (fill coating) fills and covers the weaves of fibreglass with resin and gives you something to sand into otherwise you would sand right into the fibreglass and weaken the board.
Once you’ve sanded your hotcoat, it’s time for the gloss! Resin that is. Polyester gloss resin is a different formulation from polyester laminating resin and cures harder. Or should I say more brittle. As far as I am aware the harder the substrate, the higher the lustre of polish than can be achieved. Never tried epoxy gloss, but I’m assuming it cures harder than laminating epoxy.
Like I said, I know bugger all about polishing, apart from the fact you normally apply it like a hot coat. So this is where my response ends.
I wrote that post. Thanks for finding it and posting it again. Saved me some writing. We do offer a DVD. To get it go to surfingvideos.com or from Foameasy.
No problem. I have it as a note on my desktop permanently so it took no time at all.