--- product_id: 47965949 title: "Wynn's Engine Oil Stop Leak Additive - Prevents & Stops Oil Leaks - 325ml" brand: "wynn's" price: "¥3296" currency: JPY in_stock: true category: "Wynn's" url: https://www.desertcart.jp/products/47965949-wynns-engine-oil-stop-leak-additive-prevents-and-stops-oil store_origin: JP region: Japan --- # Fast-acting seal restoration Compatible with all oil types Protects seals & engine parts Wynn's Engine Oil Stop Leak Additive - Prevents & Stops Oil Leaks - 325ml **Brand:** wynn's **Price:** ¥3296 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal on leaks before they seal your fate! ## Quick Answers - **What is this?** Wynn's Engine Oil Stop Leak Additive - Prevents & Stops Oil Leaks - 325ml by wynn's - **How much does it cost?** ¥3296 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/47965949-wynns-engine-oil-stop-leak-additive-prevents-and-stops-oil) ## Best For - wynn's enthusiasts ## Why This Product - Trusted wynn's brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Extend engine life:** Lubricates seals to protect against heat, oxidation, and wear - • **Stop leaks at the source:** Restores rubber & neoprene seals to prevent oil drips and costly repairs - • **Engine-safe & eco-friendly:** Safe for petrol, LPG, diesel engines, and catalytic converters - • **Universal oil compatibility:** Works seamlessly with mineral, synthetic, and low SAPS oils - • **No engine disassembly needed:** Quick, hassle-free application saves time and money ## Overview Wynn's Engine Oil Stop Leak Additive is a 325ml high-performance formula designed to restore flexibility to aging engine seals, stopping oil leaks without engine teardown. Compatible with all oil types and fuel systems, it protects seals from heat and wear while maintaining engine efficiency and safeguarding emission systems. ## Description This advanced oil leak stopper is a high-performance solution designed to prevent and stop engine oil leaks caused by the deterioration of rubber and neoprene seals. Over time, exposure to extreme temperatures, pressure, and engine contaminants can cause seals to dry out, shrink, and crack, leading to oil leaks that affect engine efficiency. This product effectively restores the flexibility and elasticity of seals and O-rings, reinforcing their structure to prevent further damage. Thanks to its specially formulated blend of conditioning agents, this treatment deeply penetrates the seals, rehydrating and revitalising them to restore their original shape and sealing capacity. By eliminating oil leaks at the source, this solution reduces oil consumption, protects engine components, and ensures a clean and efficient operation. Its unique formulation allows it to work without requiring engine disassembly, offering a fast and convenient way to address common sealing issues. Unlike other oil additives, this leak stopper does not alter the viscosity or chemical composition of engine oil. It remains fully compatible with all mineral and synthetic engine oils, including low SAPS applications, ensuring optimal performance without any negative impact. Additionally, it is safe for use in all petrol, LPG, and diesel engines, making it a versatile choice for various vehicle types and industrial machinery. Beyond sealing leaks, this product also acts as a protective lubricant, maintaining engine seals in excellent condition. By creating a barrier against heat, oxidation, and wear, it helps extend the lifespan of engine components while preserving efficiency. Safe for catalytic converters and emission control systems, it offers a reliable and effective solution to maintaining engine health. Ideal for vehicles and equipment requiring a leak-stopping solution without complex repairs, this product is an essential addition to any maintenance routine. Whether preventing potential oil leaks or addressing existing issues, this powerful formula ensures engines remain protected, efficient, and free from unwanted oil drips. ## Features - car parts ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0031ROB36 | | Best Sellers Rank | 355 in Automotive ( See Top 100 in Automotive ) 3 in Engine Oil Additives | | Brand | Wynn's | | Customer Reviews | 4.3 4.3 out of 5 stars (3,358) | | Date First Available | 23 Dec. 2009 | | Guaranteed software updates until | unknown | | Item Weight | 325 g | | Item model number | 50664 | | Manufacturer | Wynn Oil UK | | Manufacturer part number | 50664 | | Model | 50664 | | Product Dimensions | 5 x 5 x 11.99 cm; 325 g | ## Images ![Wynn's Engine Oil Stop Leak Additive - Prevents & Stops Oil Leaks - 325ml - Image 1](https://m.media-amazon.com/images/I/71K3SJx844L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How many tins are needed for big engines** A: Since the reason for using it is to seal leaky seals- especially the rear crankshaft seal - size doesn't Matter.I used it in my 2 litre engine and it worked well. Hope this is helpful. **Q: do you just put it in engine and thats it or do you need to drain oil first** A: Just add to engine as if topping up oil -- follow instructions on can. It made a significant difference to my engine. If your engine is due for a routine oil change then do this first and add Stop Leak with new oil. **Q: Will it stop oil coming out of the manifold on a Nuffield tractor?** A: It's really designed to soften old seals that have become stiff and letting oil pass, it doesn't stop oil leaking from splits etc **Q: can this be sprayed directly onto rubber parts?** A: I apply it once a year on all rubber in suspension and joints behind the wheel area. Simply pour it into a spray bottle and spray on those parts generously. It well protects them and last them longer. Just a few weeks ago I used on my sister's 2003 Ibiza who was annoyingly making squeaky noise on the right suspension area, now it is gone. A tin would be more than enough for your car all over. I got this idea from a car mechanic in this business for over 50 years. ## Frequently Bought Together - Wynn's 50664 325ml Engine Stop Leak - Wynn's Stop Smoke 325 ml --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/47965949-wynns-engine-oil-stop-leak-additive-prevents-and-stops-oil](https://www.desertcart.jp/products/47965949-wynns-engine-oil-stop-leak-additive-prevents-and-stops-oil) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-27*