Temperature is a very important part of resin-curing and preventing bubbles from showing up after resin has cured. If the temperature in the workspace is in the lower 70’s (°F), then use a warm water bath for the resin and hardener bottles. Using a warm water bath will help to bring the resin to the optimal temperature for resin to cure, and helps prevent micro-bubbles. However, be aware that by warming the resin, you will shorten the working time* of the resin mixture from 45-minutes to about 30 minutes. Also, make sure to dry the bottles to prevent even a drop of water into your resin mixture. Water will prevent the resin from curing properly. (*Working time is the time you have to mix and pour the resin mixture once the hardener and resin meet in the same cup.)