Originally Posted by boz86
Probably a silly question, but do you have a brand name or is this something off the shelf at West Marine?
There are a lot of sources and lots of different vinyl esters. I used to buy Dow 8086 but I have to buy 5 gallons at a time. I keep a gallon or two of 700 Vinyl Ester Resin from US Composites, on my shelf. I need to order some right now. MEKP is the catalyst. I also keep a couple of W.E.S.T. gallon kits and use them both for various things. I keep some polyester for less critical things like laying up a thick backing plate. It is less expensive for stuff like that. U.S. Composites is a convenient source. A selection of resins, foams and fabrics as well as misc. supplies. Good service, too.
This is their page that includes vinyl ester.
Except for epoxy I don't buy resins off the shelf. Age is a factor for promoted resins and both polyesters and vinyl esters are promoted. U.S. Composites promotes their resins fresh for delivery.
There are no silly questions. Glad to help.