--- product_id: 47965946 title: "K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml" brand: "k-seal" price: "$102.52" currency: USD in_stock: true reviews_count: 13 category: "K Seal" url: https://www.desertcart.us/products/47965946-k-seal-ultimate-head-gasket-and-block-repair-seal-fix store_origin: US region: United States of America --- # Seals leaks up to 0.64mm Compatible with all coolants & engines 33% more sealing power K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml **Brand:** k-seal **Price:** $102.52 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal it once, drive forever—never let leaks slow your hustle! ## Quick Answers - **What is this?** K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml by k-seal - **How much does it cost?** $102.52 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/47965946-k-seal-ultimate-head-gasket-and-block-repair-seal-fix) ## Best For - k-seal enthusiasts ## Why This Product - Trusted k-seal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **One-Step Leak Lock:** Ceramic micro-fibres instantly seal cracks and holes up to 0.64mm without engine downtime. - • **Permanent Power Seal:** Advanced formula delivers 33% stronger, long-lasting repairs that outlast the competition. - • **Effortless Application:** No draining or flushing needed—just shake, pour, and drive. Fix leaks while you move. - • **Mechanic-Trusted Reliability:** Backed by millions sold and ASTM-certified for professional-grade, cost-effective repairs. - • **Universal Engine Compatibility:** Works seamlessly with all coolant types and engine materials, from cars to heavy machinery. ## Overview K-Seal Ultimate Head Gasket & Block Repair is a professional-grade coolant additive that permanently seals blown head gaskets, cracked heads, and porous engine blocks. Featuring 33% more sealing power and ceramic micro-fibres, it fixes leaks up to 0.64mm in a single step without engine flushing. Compatible with all coolants and engine types, it’s trusted worldwide and independently verified for durability, making it the go-to solution for long-lasting, hassle-free engine cooling system repairs. ## Description Product Description Review: Works with no issues - Had a coolant leak, poured this stuff in, drove about few times, leak was gone. I had been topping up coolant and I would hear a chugging sound ( where air would be getting in from the leak), when I poured this stuff in there was 2 chuggs and then it stopped, this stuff basically starts working right away Review: Worked with heavily modified car, temp fix. - The product works great, had to unfortunately use it on my stage 3 3l a5 diesel. Temporary fix, While while I rebuild the engine, but it worked immediately, I have tried others, steel seal etc. None worked except this, however, I do believe it did damage the thermostat, but I can't say it definitely was this. Recommend. ## Features - Causes serious eye irritation. - Harmful to aquatic life with long lasting effects. - PERMANENT REPAIR: Our advanced formula with 33% more sealing power than regular K-Seal, ensures a long-lasting, permanent seal for challenging leaks. Permanently fixes blown head gaskets, cracked heads & porous engine blocks in cars. - STOP HOLES & CRACKS: With just 1 step our unique formula with ceramic micro-fibres, will permanently seal leaks up to 0.64mm in size, without any adverse impact on the engine. - EASY TO USE: It requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid wherever you top up your coolant & run your engine as normal. For larger engines (HGV's / Plant) use 2 bottles. - VERSATILE COMPATIBILITY: Works with all types of coolant & compatible with a wide range of vehicle engine materials & heavy duty machinery. A permanent fix for the lifetime of the engine. - PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our sealer treatment delivers a durable & long-lasting repair. A cost-effective head gasket & block repair, enhancing the performance of your vehicle’s cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00Q55SV6O | | Best Sellers Rank | 6,384 in Automotive ( See Top 100 in Automotive ) 82 in Fillers, Adhesives & Sealants | | Brand | K-Seal | | Customer Reviews | 3.8 out of 5 stars 600 Reviews | | Global Trade Identification Number | 05060002968109 | | Included Components | 1 Bottle | | Item Shape | Round | | Item Type Name | Head Gasket Repair | | Manufacturer | K-Seal International Limited | | Manufacturer Part Number | KSLST3501 | | Model Number | KSLST3501 | | Number of items | 1 | | Product Warranty | 1 year manufacturer | | Shape | Round | ## Product Details - **Brand:** K-Seal - **Global Trade Identification Number:** 05060002968109 - **Manufacturer:** K-Seal International Limited - **Number of items:** 1 - **Shape:** Round ## Images ![K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - Image 1](https://m.media-amazon.com/images/I/71G83KAp7FL.jpg) ![K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - Image 2](https://m.media-amazon.com/images/I/81ExIuiXz-L.jpg) ![K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - Image 3](https://m.media-amazon.com/images/I/81fjpE+5DfL.jpg) ![K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - Image 4](https://m.media-amazon.com/images/I/810oKVSrG3L.jpg) ![K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - Image 5](https://m.media-amazon.com/images/I/8133FJ18BQL.jpg) ## Questions & Answers **Q: Hi, just to makes sure, i have vauxhall corsa, coolant's leaked into the engine oil, will this work? many thanks** A: I am afraid this is a problematic symptom of a head gasket failure to repair as this is liquid to liquid. We also state that K-Seal is not suitable for coolant to oil or oil to coolant leaks and so any attempt to solve this would be the best efforts only endeavour. **Q: My volkswagen 1.9 tdi transporter is leaking exhaust gasses into the cooling system and thus over pressuring the system, will this product cure issue?** A: If the crack in the head thats causing the problems is absolutely tiny then it may fix your problem but if it's larger than a millimetre or something like that which it states on the bottle somewhere then no it wont fix the problen and unfortunately you'll have to get another head either main Stelar or eBay or something like that... **Q: I have oil leaking from the engine (v old citroen saxo). will this fix it? is it the right product?** A: No it will not stop an oil leak. It is designed to go in the coolant system and stop head gasket leaks emitting from the coolant system. If you have oil leaking from the engine at the head gasket you need the cylinder head skimming and the block re-building. If you have oil leaking for elsewhere on the engine, that will need taking apart and rebuilding with new gaskets. **Q: Have a bmw x5 4.8is v8 petrol. am losing water but only a tiny bit - have used one of these 2 weeks ago not cured - do i need 2 given engine size?** A: Hi, no there is no need to use another bottle as K-Seal is calculated by coolant capacity and not engine CC capacity. It is more likely that the leak is so small that the particles are not being drawn out of the cooling system. This is just a case of waiting a little longer for this to happen but I recommend that the engine is run for 15 - 20 mins each day if the car is not used on a regular basis. You can also email me directly if that is easier to info@kseal.com FAO Colin. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works with no issues *by C***L on 1 January 2026* Had a coolant leak, poured this stuff in, drove about few times, leak was gone. I had been topping up coolant and I would hear a chugging sound ( where air would be getting in from the leak), when I poured this stuff in there was 2 chuggs and then it stopped, this stuff basically starts working right away ### ⭐⭐⭐⭐⭐ Worked with heavily modified car, temp fix. *by A***R on 1 March 2023* The product works great, had to unfortunately use it on my stage 3 3l a5 diesel. Temporary fix, While while I rebuild the engine, but it worked immediately, I have tried others, steel seal etc. None worked except this, however, I do believe it did damage the thermostat, but I can't say it definitely was this. Recommend. ### ⭐⭐⭐⭐ This will work for some applications *by P***1 on 16 February 2024* But in my case it did not work fully. I think it reduced the problem somewhat but I can't dismiss it entirely as I can't be certain what was causing my problem. At the price, it's got to be worth a try. ## Frequently Bought Together - K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml - K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required --- ## 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.us/products/47965946-k-seal-ultimate-head-gasket-and-block-repair-seal-fix](https://www.desertcart.us/products/47965946-k-seal-ultimate-head-gasket-and-block-repair-seal-fix) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-05*