--- product_id: 62701243 title: "Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132" brand: "liqui moly" price: "R519" currency: ZAR in_stock: true reviews_count: 13 category: "Liqui Moly" url: https://www.desertcart.co.za/products/62701243-radiator-stop-leak-250-ml-cooler-additive-sku-20132 store_origin: ZA region: South Africa --- # Fast-acting sealant Compatible with all coolants Protects combustion chamber Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132 **Brand:** liqui moly **Price:** R519 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal before the leak steals your drive! ## Quick Answers - **What is this?** Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132 by liqui moly - **How much does it cost?** R519 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/62701243-radiator-stop-leak-250-ml-cooler-additive-sku-20132) ## Best For - liqui moly enthusiasts ## Why This Product - Trusted liqui moly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Engine-Safe Formula:** Prevents damage by securing the combustion chamber from coolant intrusion. - • **No Clogs, No Sludge:** Maintains optimal system performance without clogging or residue buildup. - • **Instant Leak Sealing:** Stops small radiator leaks within minutes for hassle-free rides. - • **Trusted Brand Quality:** Backed by Liqui Moly’s reputation and 4.4-star rating from 600+ users. - • **Universal Compatibility:** Works flawlessly with all cooling and heating systems, with or without filters. ## Overview Liqui Moly Radiator Stop Leak is a premium 250 ml liquid additive designed to instantly seal minor radiator leaks caused by cracks or impacts. Compatible with all coolant types and heating systems, it protects your engine’s combustion chamber without clogging or sludge buildup. Trusted by thousands, it offers a quick, reliable fix that extends radiator life and prevents costly repairs. ## Description Small leaks caused by stone impacts, porous soldering points and hairline cracks in the cooling system can be easily stopped (in addition to leaks not easily seen, by noticing decreasing coolant reservoir levels after rides). Review: Reliable Quick Fix for Minor Leaks – Works Like a Charm - I recently tried Liqui Moly Radiator Stop Leak in my older vehicle that had developed a small coolant leak, and I’m genuinely impressed with the results. I’ve used other stop leak products in the past, but this one stood out for its ease of use, fast action, and trusted brand quality. The instructions are straightforward—just shake well and pour it into the cooling system when the engine is warm (but not hot). Within minutes of running the engine, I noticed the coolant level stopped dropping, and the leak around the radiator seam appeared completely sealed. What I appreciate most is that it doesn’t clog the system or create sludge, which can be a problem with lower-quality products. My heater continued to work perfectly, and the engine temperature stayed normal. It’s compatible with all types of coolant, which adds to the convenience. Overall, Liqui Moly Radiator Stop Leak is a solid, trustworthy product that can extend the life of your radiator and save you from costly repairs in a pinch. Highly recommended as a temporary solution or preventative measure. Review: It works - So I had a small leak in my radiator for quite a while and I was sick of topping it off and seeing a small puddle in my driveway and smelling it so I had bought this stuff a friend a long time ago had recommended liquid Molly products and I have been using them some other products I use on a regular basis I am happy with this product here I poured it in I went for a 20 minute drive in it's been 4 months now and I haven't had one drop of antifreeze on the ground I can't say enough how good this product works and it doesn't clog your cooling system up it doesn't do any of that so you don't have to worry about it clogging it up this product works very very well for the money ## Features - LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease - Secures the combustion chamber from damages caused by coolant admission - For all cooling water and heating systems with and without water filters ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076ZP45Z5 | | Best Sellers Rank | #24,951 in Automotive ( See Top 100 in Automotive ) #4 in Radiator Sealers | | Brand | Liqui Moly | | Brand Name | Liqui Moly | | Color | Silver | | Customer Reviews | 4.4 out of 5 stars 646 Reviews | | Included Components | RADIATOR ADDITIVE | | Item Form | Liquid | | Item Type Name | Radiator Stop Leak | | Manufacturer | Liqui Moly | | Material | Plastic | | Material Type | Plastic | | Model | 20132 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 20132 | | Style | Modern | | Style Name | Modern | | Unit Count | 1.0 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** Liqui Moly - **Color:** Silver - **Exterior Finish:** Stainless Steel - **Material:** Plastic - **Vehicle Service Type:** Car, Truck, Van ## Images ![Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132 - Image 1](https://m.media-amazon.com/images/I/615O9mE1UiL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Have a water cooled 279cc Scooter, will this help a small leak that cant be found?** A: I used this in a semi truck radiator and it worked great **Q: How many bottles do you need for a 11 gallon cooling system** A: I put 4 bottles in 10 gal system which was plenty **Q: Will this be suitable for a 2017 bmw 330i?** A: Yes, I had a temp sensor on my 545 bmw and it sealed it up in under a week was not a leak more like a seep, also theses v8 engines tend to leak at the coolant pipe that pass through the block . used it to maintain the seals also to stop possible future leaks. Dan **Q: Will this work for the coolant transfer pipe?** A: No. If the coolant transfer pipe has a pin hole in it this will not work. The coolant transfer pipe will need to be replaced. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Reliable Quick Fix for Minor Leaks – Works Like a Charm *by A***R on July 27, 2025* I recently tried Liqui Moly Radiator Stop Leak in my older vehicle that had developed a small coolant leak, and I’m genuinely impressed with the results. I’ve used other stop leak products in the past, but this one stood out for its ease of use, fast action, and trusted brand quality. The instructions are straightforward—just shake well and pour it into the cooling system when the engine is warm (but not hot). Within minutes of running the engine, I noticed the coolant level stopped dropping, and the leak around the radiator seam appeared completely sealed. What I appreciate most is that it doesn’t clog the system or create sludge, which can be a problem with lower-quality products. My heater continued to work perfectly, and the engine temperature stayed normal. It’s compatible with all types of coolant, which adds to the convenience. Overall, Liqui Moly Radiator Stop Leak is a solid, trustworthy product that can extend the life of your radiator and save you from costly repairs in a pinch. Highly recommended as a temporary solution or preventative measure. ### ⭐⭐⭐⭐⭐ It works *by W***3 on May 14, 2026* So I had a small leak in my radiator for quite a while and I was sick of topping it off and seeing a small puddle in my driveway and smelling it so I had bought this stuff a friend a long time ago had recommended liquid Molly products and I have been using them some other products I use on a regular basis I am happy with this product here I poured it in I went for a 20 minute drive in it's been 4 months now and I haven't had one drop of antifreeze on the ground I can't say enough how good this product works and it doesn't clog your cooling system up it doesn't do any of that so you don't have to worry about it clogging it up this product works very very well for the money ### ⭐⭐⭐⭐⭐ IT ACTUALLY WORKS *by S***R on August 1, 2025* UPDATE 2..... I drive a 2015 Audi S5. It has 140k on motor. It started leaking antifreeze at 133k miles to where i had to carry a bottle of it with me and usually had to put more in every 5 to 6 days. I am at day 35..... AND THE MOLLY RADIATOR STOP LEAK HAS WORKED 100 PERCENT. I DROVE IT FROM Melbourne FL TO Jacksonville FL ABOUT 250 MILES ROUND TRIP AT APPROX 90 MPH AND THE FLUID WAS AT THE SAME LEVEL AND NO OVERHEAT ISSUES. I ALSO HAVE A REVIEW ON VALVE COVER LEAKS I WAS HAVING ISSUES AS WELL. ## Frequently Bought Together - Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132 - Liqui Moly Radiator Cleaner | 300 ml | Cooler additive | SKU: 2051 - Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009 --- ## 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.co.za/products/62701243-radiator-stop-leak-250-ml-cooler-additive-sku-20132](https://www.desertcart.co.za/products/62701243-radiator-stop-leak-250-ml-cooler-additive-sku-20132) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-23*