If you want it to flash very quickly thin it with Acetone or if medium flash use MethylEthylKetone (M.E.K) or if you want it to last a good long time use Alcohol.
I use Acetone, A little bit thins out the epoxy a bunch. It soaks in real fast and acetone evaporates fast too allowing epoxy to thicken back up and set quicker as well.
ALL my wood boats are sealed this way, The water thin epoxy really soaks in the first few coats and causes the wood to get a very hard and durable skin.