Adding solvent to TotalBoat Penetrating Epoxy will slightly increase its working time, however, this should only be done when needed for deeper penetration, rather than extending working time. It should be understood that by adding solvent to TotalBoat Penetrating Epoxy, it is not possible to predict how much the working time will be increased, based upon volume, conditions, and the solvent that is being added.
The preferred way to extend working time for epoxy is to reduce its temperature, or reduce the ambient temperature, or both (making sure to stay within the epoxy's working temperature range).