I am building a yost sea rider and I bonded the keel to the cross sections 2 days ago and the epoxy is still like gum.I mixed West System 105 resin,206 hardener and 403 adhesive filler. The 105-5 parts and the 206-1 part without a pump but with a mixing cup. Then added the 403 to thicken. The epoxy is like a some what hard gum,but not sticky. Did I mix to much 403 into the mixture? I think I will have to cut the keel of and redo it. kirk