+x MarkMK - 8/31/2019 8:15:10 AMYes, resin will tend to 'go off' much quicker than gel coats and temperatures above 20 degrees will accelerate things quite a lotBe wary that some catalysts will be formulated to be fast acting also and designed to work better in cooler conditionsIf you can't control the ambient temperature, then working with smaller batches of resin can help to try and avoid things hardening before you've had time to apply