Engine Stop Leak 325ml

Product code: WYN50664

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£10.49

£8.74 ex. VAT

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Wynns Engine Stop Leak 325ml

Part Number: WYN50664

Wynns Engine Stop Leak is a specialized oil additive formulated to seal and stop external oil leaks in gasoline and diesel engines. This effective 325ml formula uses advanced polymer agents that swell and recondition hardened, shrunken, or deteriorated seals and gaskets, reducing or eliminating common oil leaks without mechanical repair. The non-clogging formula is compatible with all mineral, semi-synthetic, and fully synthetic engine oils, offering a cost-effective solution for minor to moderate oil seepage and leaks.

Product Characteristics

• Revitalizes and expands dried or shrunken seals and gaskets.
• Stops or reduces external oil leaks effectively.
• Compatible with mineral, semi-synthetic, and synthetic oils.
• Non-clogging formula safe for oil passages and filters.
• Helps maintain seal elasticity in aging engines for preventative care.
• Reduces oil consumption caused by external leaks.
• Prevents oil stains on driveways and parking spaces.
• Much cheaper than mechanical gasket or seal replacement.
• Simple application — just add to engine oil.
• Provides lasting effect throughout the oil change interval.

Storage & Shelf Life: Store in a cool, dry place in tightly closed original packaging. Protect from frost and direct sunlight. Shelf life 5 years from production date.

How to Use

• Add the entire 325ml bottle to the engine oil at normal operating temperature.
• One bottle treats 4–6 liters of engine oil.
• Drive normally to allow circulation through the oil system.
• Results may appear within 200–300 miles, with full effect in 500–800 miles.
• For preventative use in high-mileage engines: apply every other oil change.
• For active leaks: a second treatment may be applied at the next oil change if needed.

 

Engine Stop Leak is ideal for sealing oil seepage from valve cover gaskets, oil pan gaskets, timing covers, and rear main seals without expensive repairs. Best suited for older, high-mileage vehicles with seal shrinkage. Not recommended for cracked components or severe leaks needing mechanical repair. For enhanced performance and protection, use alongside Wynns Engine Treatment.

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