I've had that happen before. Results weren't good. If you're using Raka Slow hardener, I've never known a properly batched mix to not cure to non-tackiness at 60*F after two days. Beyond that, it's probably operator error, and the epoxy won't cure.

I had a mismixed batch a year ago: too much hardener. (actually, several mismixed batches until I threw that pump out) They never fully cured; always rubbery and flexible. I used the mismixed epoxy on a foam-cored paddle blade, as well as a couple of diagonal "feather" paddle blade blanks. When I hit them with the band saw it all fell apart. Do you have another paddle to use for the weekend? Go out and use it. If the others aren't cured when you return, get out the acetone and vinegar and start over.

At least you had a good sealer coat--my wood paddle blades ended up being firewood and the foam-cored one is slowly disintegrating as I paddle with it. After I finish the boat, I'm going to make a concerted effort to make some good paddles (with properly ratio'ed epoxy!)

Have a great weekend, and I hope the epoxy finally cures.

Shawn
: Aaaaaargh!!!

: I pulled the leftover puck of epoxy from my measuring cup and found that, 24
: hours later, it is actually still rubbery. The odd thing is that my
: regular 84" paddle is slightly tacky, but, I hope, useable. The storm
: paddle is much tackier and still leaves fingerprints. Both were from the
: same well-mixed (but poorly measured) batch. The regular one must have
: recieved a heavier coat.

: Right now I have them under a 'tent' of cardboard boxes with (2) 100-watt
: work lights and the temperature is a good 85 degrees under there. I hope
: this is still salvageable. On the plus side, the sealer coat cured
: properly, it's the second coat that didn't kick. If I have to remove it, I
: won't have to go all the way down to wood. I had hoped to put a
: moisture-cure polyurethane clearcoat on them, but if the epoxy isn't fully
: cured, the hard urethane won't be durable -- kind of like putting that
: chocolate shell on ice cream...

: Dean