I am wondering if any of you have any rules on how long you leave epoxy in the sun before mixing with hardener.
On my latest board I used the Hawaiian epoxy which was purchased from Burfords blanks at Currumbin Queensland.
For the laminating coats the epoxy was left in the sun for one hour prior to glassing, warm day early spring here temperature about 25 degrees celcius or 76 degrees farenheit, I used the slow hardener and ended up getting 40 minutes of work time.
The resin fowed nicely and was easy to work with, 3 hours later no longer tacky.
Same with epoxy filler coat on bottom, resin in sun for one hour, 40 minutes work time.
For the deck coat I left the epoxy in the sun for 3 hours and when pouring into the mixing cup noticed it was much runnier.
This time the resin went off after 30 minutes, 10 minutes less work time.
So my question is, is 5 minutes of work time lost for every hour epoxy is left in the sun, is this a reasonable ballpark number to use.
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