Bar's Leaks Hydraulic Seal Stop Leak & Conditioner is designed to keep hydraulic seals soft and pliable and reduce friction and wear in hydraulic systems. Our formula cleans and prevents harmful formation of sludge and varnish while helping keep the hydraulic systems run cooler and last longer. Rislone Hydraulic Seal Stop Leak & Conditioner mixes with all factory approved hydraulic fluids and synthetics. Works on all Petroleum Synthetic Fluid, Pump Seals, Control Valve Seals, Actuators, Rams, Cylinders, O-ring Boss Hose Fitting, and Hydrostatic Transmission. This formula is safe to use on Construction, Farm, Manufacturing, Forestry Machinery, Mining, and Marine.