{"product_id":"radiator-stop-leak-powder-car-cooling-system-sealer","title":"Radiator Stop Leak Powder – Car Cooling System Sealer 20ml","description":"\n\u003ch2\u003eSeal Cooling System Leaks Quickly \u0026amp; Easily\u003c\/h2\u003e\n\u003cp\u003eKeep your engine running cool with this \u003cstrong\u003eRadiator Stop Leak Powder\u003c\/strong\u003e — a non-toxic, fast-acting sealing compound designed to seal leaks in your car, truck, van, bus, or tractor's radiator and cooling system. Simply pour the powder in, run the engine, and let the formula do the work — no dismantling required.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eFormulated with a powerful blend of \u003cstrong\u003ewood fiber, silicon dioxide, and silver powder\u003c\/strong\u003e, this stop leak powder rapidly mixes and flows throughout the entire cooling system. It forms an ultra-thin boundary sealing layer that is:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh temperature resistant\u003c\/strong\u003e — holds firm under engine heat\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh pressure resistant\u003c\/strong\u003e — handles the demands of a pressurized cooling system\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eAnti-vibration\u003c\/strong\u003e — maintains a lasting, durable seal\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompatible with all antifreeze types\u003c\/strong\u003e — works seamlessly with your existing coolant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e 20ml per tube\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 41g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTreatment Coverage:\u003c\/strong\u003e One tube treats cooling systems up to 3 gallons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Vehicles:\u003c\/strong\u003e Cars, trucks, vans, buses, and tractors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant: Know What Can Be Sealed\u003c\/h3\u003e\n\u003cp\u003eThis product is designed to seal \u003cstrong\u003esmall drip-type leaks\u003c\/strong\u003e — water escaping as drips or a slow seep. It is \u003cstrong\u003enot\u003c\/strong\u003e suitable for large breaks where water flows out in a stream or column.\u003c\/p\u003e\n\n\u003ch3\u003eStep-by-Step Instructions\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCool the engine completely\u003c\/strong\u003e before opening the radiator cap. Opening a hot cooling system can cause serious burns.\u003c\/li\u003e\n  \u003cli\u003eIf the cooling system is dirty or partially clogged, flush it thoroughly before use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePour the entire tube of powder slowly\u003c\/strong\u003e into the radiator. Add gradually to prevent clumping at high temperatures.\u003c\/li\u003e\n  \u003cli\u003eFill the radiator and overflow tank to the proper level and reinstall the radiator cap.\u003c\/li\u003e\n  \u003cli\u003eRun the engine at a speed sufficient to circulate coolant for approximately \u003cstrong\u003e15 minutes\u003c\/strong\u003e, until the coolant reaches operating temperature and the leak stops.\u003c\/li\u003e\n  \u003cli\u003eIf the leak persists, a second application may be needed. For larger leaks, catch any draining solution and pour it back into the radiator, repeating until a complete seal is achieved.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDo not change the coolant water for at least one week\u003c\/strong\u003e after treatment to allow the seal to fully cure.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003e⚠️ Caution\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNever open the cooling system while the engine is hot or running — this may cause severe burns.\u003c\/li\u003e\n  \u003cli\u003eVehicle radiators with very narrow pipes and low water flow may be prone to clogging if powder is added too quickly. Always add slowly and carefully.\u003c\/li\u003e\n  \u003cli\u003eNot intended for large-scale structural damage where coolant streams out forcefully.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and accessories for your DIY projects? Check out these related products from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/leather-hole-punch-tool-diy-stitching-punch-4-5-6mm\"\u003eLeather Hole Punch Tool | DIY Stitching Punch 4\/5\/6mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-ceramic-trimming-tool-curved-skip-knife\"\u003eStainless Steel Ceramic Trimming Tool – Curved Skip Knife\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/airtight-transparent-pet-storage-bottle-craft-beads-home-organization\"\u003eAirtight Transparent PET Storage Bottle | Beads \u0026amp; Crafts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.fueleconomy.gov\/feg\/maintain.jsp\" target=\"_blank\" rel=\"noopener\"\u003eFuelEconomy.gov on vehicle maintenance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the Radiator Stop Leak Powder safe to use with antifreeze already in the system?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This radiator stop leak sealer is fully compatible with all types of antifreeze and coolant mixtures. You do not need to drain your system before adding the powder — simply ensure the engine is cool, then pour the powder directly into the radiator.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How long does it take for the radiator stop leak powder to seal a leak?\u003c\/h4\u003e\n\u003cp\u003eA: In most cases, running the engine for approximately 15 minutes after adding the powder is sufficient for the sealing compound to circulate and form a durable seal. For larger or more stubborn drip leaks, a second application may be needed.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this sealer on any vehicle type?\u003c\/h4\u003e\n\u003cp\u003eA: This cooling system leak sealer is suitable for a wide range of vehicles including cars, trucks, vans, buses, and tractors. One 20ml tube treats cooling systems holding up to 3 gallons of coolant.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of leaks can this product fix?\u003c\/h4\u003e\n\u003cp\u003eA: This radiator stop leak powder is effective on small drip-type leaks in the radiator, cylinder heads, and water jackets. It is not designed for large breaks where coolant flows out in a heavy stream or column.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the Radiator Stop Leak Powder safe to use with antifreeze already in the system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This radiator stop leak sealer is fully compatible with all types of antifreeze and coolant mixtures. 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