Non-hazardous, non-DOT regulated liquid peroxide breakers that provide predictable, controllable breaks at temperatures from 190-250°F (87.8-121.1°C) with crosslinked and FR fluids. These breakers offer service companies a safer experience with increased ease of pumping, all while increasing functionality, predictability, and control over a key temperature range. Because of the breaking mechanism of the free radical, rebound/reheal effect is much less of an issue with crosslinked fluids.