first board i made came up really tacky. After i hot coated i went to sand and it was like sanding bubble gum. Well the board rides good so its not that big of a deal but are there any suggestions on fixing this problem. Like i said it rides good so i would like to fix it but more importantly i don’t want this on my next board. I might need to use a wax compound (stirine or something like that) if this is right then how and when should i use it if this isnt right then what should i do?
Do you mean that you used the same resin to laminate AND hotcoat? And that the resin didn’t have any wax in it? If so, that’s your problem. When you hotcoat you need to add some wax solution to your laminating resin or use sanding resin (which has the wax solution already added to it).
The wax blocks off the air and allows to resin to go off nice and hard and won’t gum up your paper much.
You could redo a thinned hotcoat (with sanding resin) and then the board should setup non-tacky but if you’ve already waxed the deck, you’ll have to make sure that you get the wax completely off to allow the next resin coat to bond decently.
Maybe missed the catylist ratio, or were you working outdoors (moving air can evaporate the styrene too quickly), or possible just bad/old resin?
Lam resin and hot-coat resin already come with its styrene added - *adding extra would not normally be needed. In regards to the hot-coat resin, if it was labeled hot-coat or sanding resin, it would also already have the wax added as well - adding extra would not be necessary.
Do you remember what ratio you used, at what temp, humidity, how old was the resin, etc?
Best,
Herb
*you would usually only add extra styrene to thin resin - usually for glossing purposes.
yeah i waited like 2 weeks, i guess it was just the wrong catalyst amounts. the next two boards i am working on i will be taking to a local glasser simply because i really need these to be perfect glass jobs i also want some cool airbrushing. after that i am going to be doing all my own glassing. i have been searching the archives and really cant find a clear chart or whatever that shows resin/catalyst/hotcoat amounts. Let me know where i should be looking.
10 cc’s for a quart of hotcoat will give you about 20-25minutes before its gelled completely. That what we shoot all our hotcoats at and havnt had any problems.
What temperature do you shoot your hotcoats in? I prefer more catalyst for the hotcoat. At about 18-20 degrees C (64-68F) I prefer to shoot the hotcoat at 2.5-3% catalyst (12.5-15cc), which seems to give around 15mins to gel.
so if im about to do a 9’0 and would rather be safe than sorry right now as far as resin amounts go i would be good with 1 gal of resin 4 oz of cat. and 1 gal of hotcoat does this sound close to anyone
matt, about the same temps for hotcoating, i guess thats why ours just takes a bit longer, plenty of time on my hands im in no rush…and in regards to the maounts of resin you suggested “longboarder”…that will be fine for a 9’0