Which brand is that? I'd like a cheaper alternative to West System myself.
It's no-name bulk resin I get from a local fiberglass materials shop (Ultra Lux Plastics). George buys it by the drum and repackages it in 4 liter cans.
Faster can vouch for their stuff as he used it, on my recommendation, when he rebuilt the keel grid in his boat, as detailed on this forum.
I have used other bulk or industrial no-name epoxy as well with similar good results. You simply have to hunt around your area for the people who sell it. Avoid "marine" outlets if at all possible.
Outfits who make stone counter tops use a lot of it for one. I found a supplier on Craigslist once. Boatyard advice put me on to Ultra Lux.
I did a lot of experimenting with resins and additives over the years and never had a failure so I recommend you simply start getting sticky
- you pretty well can't lose unless you do something really
dumb like glassing over paint.
As for brand name stuff, I like System Three better than West. It cures to a slightly less hard finish - slightly "nylon" like. I've heard good things about MAS as well but have never used it. Apparently it doesn't blush which makes laminating & recoating simpler.
In my experience there is no difference in "quality" between all the different ones I've used, only differing properties - mix ratio, cure time, hardness of the cured resin, viscosity (for laminating glass fabric), temperature range and/or wetness it will cure in and so forth. I've been told by people in the business that there are few actual refiners of the base resins. All the different vendors purchase their base stock from these few refiners and simply add their proprietary additive packs to tailor the base stock for various specialized purpose like cold weather cure etc.
If you plan on using a fair bit of it, it is well worth hunting for a cheap bulk supplier - I pay 1/2 or less of what West would cost here, although some members have advised that West seems particularly expensive here. Another factor to consider is additives - Cab-o-Sil, talc, balloons etc. The same suppliers usually have them in bigger quantities and much cheaper as well.
Some price examples - I pay $100 net for a 5 liter kit of 4-1 epoxy. Locally West runs about $150 for a 4 liter can of resin and $35-$50 for the hardener, depending which speed, plus 12% tax. I bought a cement sack of talc for $25 vs. those quart? cardboard cans of West product that run $10-$20 depending on the product.