Bardahl Manual Gearbox Stop Leak SpecificationsBardahl Manual Gearbox Stop Leak restores the original properties of internal and external O-rings effectively preventing leaks and seepage. However this product does not recondition cracked or broken gaskets and does not act on paper seals. Its formula also restores oil performance thanks to the presence of new additives and extends the life of the various mechanical components. Warning: this treatment is not compatible with automatic and overdrive gearboxes.How to use: Shake the tube and pour the contents into the gearbox oil sump. The maximum dosage is 10% of the capacity of the sump respecting the recommended oil level.