Lucas Hydraulic Oil Booster Stop Leak was formulated to renew hydraulic fluid with an additive package that stops seal leaks and boosts pressure. This product also reduces operating temperatures and increases the life of hoses, rams and cylinders. It is an inexpensive solution to most hydraulic problems and a perfect preventative maintenance product.  It also has an additive for hydraulic systems that stops leaks and increases hydraulic pressure. You can use it in new units to stop initial wear and increase fluid life.