PWR-4 Maintenance Cleaner from Techspray is a cleaning solvent engineered to be a safer alternative to common industrial solvents like n-propylbromide. It quickly dissolves oils, greases, fluxes, silicones, dirt and grime. Fast evaporation and high-dielectric strength allows work to be completed quickly. The solvent is designed for wiping down ultrasonic cleaning equipment and vapor-degreaser equipment, and comes in 1-gallon, 5-gallon or 55-gallon drums. 800/858-4043; www.techspray.com.