Rescue your engine from oil leaks with STP Engine Stop Leak (428ml), a high-performance formula that reconditions seals and gaskets to stop minor leaks without disassembly. This advanced polymer treatment works on valve covers, rear mains, oil pans, and more – reducing oil loss, preventing costly repairs, and extending engine life in high-mileage or aging vehicles.

Key Benefits:

✔ Seals Minor Leaks – Rehydrates hardened rubber/neoprene seals
✔ Reduces Oil Consumption – Helps prevent burn-off through worn guides
✔ 428ml Concentrate – Treats engines up to 6L capacity
✔ Preventive Protection – Conditions seals before major leaks develop
✔ Universal Compatibility – Safe for gasoline & diesel engines

How It Works:

1. Swelling Action – Expands slightly dried seals

2. Plasticizers – Restores flexibility to gaskets

3. Sealant Polymers – Temporarily fills micro-gaps

How to Use:

1. Add to Engine Oil – Pour entire bottle into oil filler

2. Drive Normally – Works over 50-150km of driving

3. Monitor Leaks – Reapply if needed (up to 2 treatments)

Pro Tips:

 Best for:

• Weeping valve cover gaskets

• Minor rear main seeps

• Oil pan gasket drips
  Not For:

• Major leaks (>1 drop per minute)

• Head gasket failures
  Pair With – STP High Mileage Oil for best results
  Storage – Keep tightly sealed

Works On:
✅ Gasoline & Diesel Engines
✅ Synthetic & Conventional Oils
✅ Engines with 100,000+ km