Posted by ken on June 27, 2003 at 19:32:23:
In Reply to: sticky spots in polyester resin posted by steve r on June 24, 2003 at 09:04:31:
: Hello.
: I am new to fibreglass and am having trouble.
: I mix the resin and hardener according to the directions. and when i stir it it changes colour from pink to green. I then apply with a brush to the wood. It seems that after a few minutes the resin in my pail starts to change colour again, and this doesnt dry as hard. The next day yhe first bit of resin dries hard but the other stuff is tacky. Do i need more hardener?
: Steve
Without knowing any more particulars, it sounds like the mix isnt completely and thoroughly mixed up. When you say it is mixed according to the instructions, can that mean it was mixed in the correct amounts, but possibly not mixed thorough enough? Just proposing the best I can.
Then there is the wax in the resins that floats to the top in the cure process. Your brand might have a lot of the wax, and you saw it in different forms such as the thin layer you spread out on the job, and the thick stuff in the can.
Is it only sticky on the top surface, or soft thru and thru???