I haven't had flexcoat yellow on anything that I have done in the last year or so. I had a rod my dad built me about 25 years ago and it yellowed . I think he used flexcoat but I am not sure. It only yellowed after I took it wade fishing though. I think I am gonna try U40 on this surf rod I am working on.
i would give u40 a try..ive used flexcoat..and devcon on most of my rods... the flexcoat is starting to yellow on one of them... and the devcon is still clear... weird because devcon is only like $4 a bottle lol .... u40 is suppost to be alot easier to work with... bubble free it says lol
I now this is an old thread but wanted to put my 2 cents worth in.
All coatings have a shelf life some differ from others. This is the reason I don't use Flex coat it is made in such bulk it could expire before you purchase it. This is the reasoning for the yellowing after only a few months. Then again if you get a new batch its not a problem.
I have never used U40 and to be honest havent heard of it till now. So I guess I will have to try it out.
I personaly use Clear Coat epoxys usually heavy build for surf rods. Thin Build for trout rods or lighter blanks.
I use the Dura Gloss LS Supreme by U-40. They offer both a low build as well as a high build. While many people are extremely successful with the Flex Coat products, I get longer working time and many less bubbles with the LS Supreme.