Penrite Engine Stop Leak 375ml

Penrite Engine Stop Leak – Seal Conditioning Oil Additive

Penrite Engine Stop Leak is specially formulated to help control engine oil leaks caused by worn or deteriorated seals and gaskets, including rear main seals. It works by gently conditioning and revitalising ageing rubber components, helping to reduce oil loss and maintain lubrication within the engine.

By restoring flexibility to seals and gaskets, it helps reduce the risk of oil leakage onto hot engine components such as exhaust manifolds, catalysts, and pipes—thereby lowering the risk of smoke and potential fire hazards. In some cases, it may also help reduce excessive oil consumption.

Compatible with mineral, semi-synthetic, and fully synthetic engine oils, it is safe for use with all common engine materials, including cast iron, aluminium, and magnesium.

Key Benefits:

• Revitalises worn and deteriorated seals and gaskets
• Helps reduce engine oil leaks, including rear main seal leakage
• Reduces oil consumption
• Helps minimise risk of oil-related smoke and fire hazards
• Compatible with all engine oil types (mineral, semi-synthetic, synthetic)
• Safe for all common engine metals

Application:

• Add 1 bottle (375 ml) to engine via oil filler cap
• Treats up to 6 litres of engine oil
• Recommended for use at every oil change for best results

Important Information:

• Designed as a temporary repair aid, not a substitute for mechanical repair
• Persistent leaks may require component replacement or professional repair
• Not recommended for VVT-i petrol engines or diesel engines with oil-operated injector pumps

A practical seal-conditioning additive designed to reduce oil leaks and support engine reliability in ageing or high-mileage vehicles.