Maintenance cleaners clean oil and contaminants off of metal parts, printed circuit boards, barcode instruments, switch boxes, gear boxes, and engines. Techspray has produced Blue Shower® maintenance cleaners for over 30 years, making Blue Shower a staple in maintenance departments all over the world! G3 Blue Shower is patented non-flammable cleaner formulated to be powerful, yet economical. Eliminate brushing and scrubbing, saving time and materials.