Pro-Strength Rear Main Seal Stop Leak (RMSSL)
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.
Benefits:
- Reduces rear main oil leaks fast
- Revitalises hardened seals
- Reduces oil consumption
- Reduces exhaust smoke
- Works on crank seals, cam seals and gaskets
Pack sizes
Fix/Restore
Bring your car back to life.
When issues arise, Nulon Fix & Restore engine and fuel treatments assist in returning your vehicle to normal operation. Whether it's addressing rough idling, diesel fuel issues, engine leaks, sludge build-up, or gasket failures, these products restore smooth operation by cleaning critical engine and exhaust components and resolving the root cause of common performance problems. Get back on the road with confidence, with Nulon’s premium range of engine and fuel treatments.
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
Product reviews
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This commment is unpublished.
I have a 2009 BMW 125i manual coupe (now 15 years old), with 130,000 km on the clock. At my service in 2023, the mechanic noted a slight leak from the rear main seal. I had not observed any leak from under the car, and there was no oil spots on the garage floor. I duly added Pro-Strength Rear Main Seal Stop Leak (RMSSL), and at the 2024 service 12 months later, the mechanic told me that the leak had stopped. I've added another bottle after the oil change. The product seems to work. -
This commment is unpublished.
My 505 Peugeot GTI (350,000 km) had sat undriven for six months causing the rear main seal to shrink and harden. After an oil change with cleaner new oil and a can of pro- strength Nulon Seal Stop leak the virtual bushfire underneath the car completely disappeared. Gotta love modern chemistry!