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SealLube Positively Stops Existing Leaks In Any Fluid System: Gasoline engines, diesel engines, marine engines, farm tractors, hydraulic systems, manual transmissions, automatic transmissions, power steering units, rack and pinion, jacks, heavy equipment, differentials, refillable shock absorbers, gear cases, I/O drives, PTO valves and air conditioners. Do not use in brake systems. The SealLube formula quickly revitalizes hard, shrunken, leaking rubber seals to original condition and prolongs the life of all seals to prevent future leaks. SealLube added to any system will prevent future leaks by conditioning even new seals. Does not work on paper or cork. Compatible with all manufacturers’ fluids, both conventional and synthetic. DIRECTIONS: 1. With engine or equipment not operating, add one 8 oz. bottle of SealLube to fluid reservoir, crankcase, or oil sump up to an 8 quart capacity (or 1 oz. of SealLube per quart capacity). 2. Start engine and drive vehicle or operate equipment as normal. The SealLube formula quickly revitalizes hard, shrunken, leaking rubber seals to like new condition as the fluid circulates. Since SealLube does not contain petroleum distillates, which can destroy seals after temporarily expanding them, it is safe to repeat the treatment if the seal/system ever leaks in the future.