I believe the setting rate depends on available moisture. In a situation with low humidity or very low wood moisture content you may well want to add some water to the glueline. I haven't used Gorilla glue for a long time but I seem to recall that the package called for 10% mc - currently they suggest adding moisture to the mix. No doubt it will cure fine without added water in most situations but it is a factor to consider, especially if you are trying to cycle panels through the press quickly.