: I epoxied my plywoood scarf joints 2 nights ago and the epoxy that was
: forced out of the joint has gone sort of rubbery . I contacted the shop
: where I bought my epoxy he said that I probably didn't mix a big enough
: batch to make it kick off , I'm using aqua set epoxy from fiber-tech in
: Vancouver, he said to pull the joints apart and put a fresh batch on over
: the old stuff and re-clamp . My problem is that I tried to pull the joints
: apart but it won't come apart, I just put some fresh epoxy over the seams
: . I'm sure the new stuff will set up but I couldnt get between the scarfs,
: does anyone know if given time the stuff between the joints will set? I'd
: really hate to cut all the joints and then re-scarf and glue making my
: kayak 2 or 3 inches shorter than it's supposed to be . I plan on glassing
: both sides of the hull . Will the scarfs be a weak spot that I'll have to
: worry about ? The leftover epoxy in my mixing cup isn't sticky to the
: touch just kinda rubbery , some chemical reaction must have started the
: garage is around 13C not overly cold . Thanks again for the advice .

Hopefully it has just been too chilly for your epoxy to set fully yet. There is no such thing as mixing too little to set if the ratio mix is right. If you still have the epoxy in the cup here is what you can do. Take a heat lamp or even a heat gun and heat the epoxy really hot. Let it cool down. If it's OK it will harden quickly and you will know your joint will finally harded. If it stays rubbery then you have a problem. But even if the scarf joint doesn't set up, perhaps you can double reinforce that joint with glass if taking it apart is really going to be a big problem.

John