Pro-Strength Rear Main Seal Stop Leak

Nulon Pro-Strength Rear Main Seal Stop Leak is a concentrated formula designed to eliminate rear main oil leaks due to seal shrinkage, hardening and deterioration. Suitable for use in all petrol, LPG and diesel engines.

Use this product if your car has any of the following symptoms:

Loses or leaks oil, blows blue smoke at start-up, on take-off or when decelerating downhill.


  • Reduces rear main oil leaks fast
  • Revitalises hardened seals
  • Reduces oil consumption
  • Reduces exhaust smoke
  • Works on crank seals, cam seals and gaskets
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Directions for Use

DIRECTIONS FOR USE: Add 1 bottle for every 5 litres of engine oil. Shake bottle and add contents to engine oil. Idle engine for at least 1 minute. Use with every oil change.

NOTE: It may take 2 days or 150km to achieve maximum benefits. Excessively worn or damaged seals may not respond and will require replacement.

CAUTION: Do not reuse container for any other purpose