NO-LEAK works in all geardrive and mix's with all oils, including synthetics and synthetic blends.
As the rubber seals age and wear under heat and pressure, they shrink, harden and dry up, which can result in oil leaks. (small pools or damp patch's under your drive carriage). NO-LEAK safely swells, softens, and conditions the rubber seals, which stops the leaks, and avoids costly repairs.
If the leak is too severe you should have the geardrive repaired by a qualified service technician.