--- product_id: 5618885 title: "K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required" brand: "k-seal" price: "96 zł" currency: PLN in_stock: true reviews_count: 13 category: "K Seal" url: https://www.desertcart.pl/products/5618885-k-seal-st5501-multi-purpose-one-step-permanent-coolant-leak store_origin: PL region: Poland --- # One-step, no flushing needed Seals leaks in minutes Permanent, professional-grade fix K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required **Brand:** k-seal **Price:** 96 zł **Availability:** ✅ In Stock ## Summary > 🛠️ Fix leaks fast, drive worry-free—because your engine deserves the best! ## Quick Answers - **What is this?** K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required by k-seal - **How much does it cost?** 96 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/5618885-k-seal-st5501-multi-purpose-one-step-permanent-coolant-leak) ## 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 - • **Rapid Leak Sealing:** Fixes radiator, head gasket & more in minutes—no downtime. - • **Effortless Application:** Just shake, pour & go—no draining or flushing required. - • **Universal Compatibility:** Works with all antifreeze types & up to 12-cylinder engines. - • **Long-Lasting Reliability:** Trusted by mechanics worldwide with ASTM D3147 certification. - • **Cost-Effective Engine Savior:** Save thousands on repairs—permanent seal for your cooling system. ## Overview K-Seal ST5501 is a professional-grade, one-step coolant leak repair solution that permanently seals leaks in radiators, head gaskets, freeze plugs, and more. Compatible with all antifreeze types and suitable for cars and light trucks up to 12 cylinders, it requires no draining or flushing—just shake, pour, and go. Independently tested and trusted by mechanics worldwide, it offers a cost-effective, durable fix that extends engine life and prevents costly repairs. ## Description Experience the ultimate solution to coolant leaks with the K-Seal ST5501, a multi-purpose, one-step permanent coolant leak repair. Our powerful formula works seamlessly with all antifreeze, making it a universal fit type for all your needs. No need for draining or flushing your system. The K-Seal ST5501, also known as a head gasket stop leak, works by sealing leaks efficiently and permanently. It also doubles as a radiator stop leak, effectively putting an end to any leaks in your radiator. The permanent leak sealer is easy to use - just shake, pour, and go. This product excels in fixing cracks and leaks in several components including the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing, and engine blocks. With a single 8 fluid ounce bottle of our coolant leak sealer, you can treat up to 20 quarts cooling capacity. This heavy duty stop leak sealant is a must-have for all your coolant leak issues. So, forget your coolant leak worries with the K-Seal ST5501 HD. Experience the power of a seal stop leak that stops leaks permanently, offering peace of mind and extended life for your vehicle's cooling system. Trust the K-Seal coolant leak repair for a lasting solution to all your coolant leak problems. ## Features - FIX IT FAST: Our multi-purpose solution works in minutes to quickly & permanently seal leaks in the radiator, head gasket, freeze plugs, block, heater matrix & water pump. Fixes most leaks in water-cooled engines - STOP HOLES & CRACKS: With just 1 step our unique formula will seek out each hole & crack, permanently sealing them, without any adverse impact on the efficiency of your engine cooling - EASY TO USE: K-Seal couldn't be simpler to use & requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid to your coolant system & run your engine as normal - VERSATILE COMPATIBILITY: Compatible with all types of antifreeze coolant. Suitable for use in both cars & light trucks with up to 12 cylinders. A permanent repair for the lifetime of the engine - PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our sealer delivers a durable & long-lasting repair. A cost-effective solution to engine coolant leaks, enhancing the reliability & 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 | B001QT9KO6 | | Best Sellers Rank | #1,301 in Automotive ( See Top 100 in Automotive ) #1 in Cooling System Additives | | Brand | K-Seal | | Brand Name | K-Seal | | Color | BLUE | | Compatible Material | All Types of Antifreeze / Coolant and Other Additives | | Customer Reviews | 4.3 out of 5 stars 13,150 Reviews | | Global Trade Identification Number | 05060002968017 | | Included Components | K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair | | Item Dimensions | 3.5 x 1.5 x 4.5 inches | | Item Form | Liquid | | Item Type Name | Engine Coolant Leak Repair | | Item Weight | 0.26 Kilograms | | Item dimensions L x W x H | 3.5 x 1.5 x 4.5 inches | | Manufacturer | Solv-Tec | | Material | Plastic | | Material Type | Plastic | | Model | ST5501 | | Number of Items | 1 | | Part Number | ST5501 | | Style | Compact | | Style Name | Compact | | Surface Recommendation | Metal | | UPC | 367157659506 812646010004 | | Unit Count | 1.0 Count | | Warranty Description | When K-Seal makes a repair we guarantee it will be permanent | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** K-Seal - **Item Weight:** 0.26 Kilograms - **Item dimensions L x W x H:** 3.5 x 1.5 x 4.5 inches - **Material:** Plastic - **Style:** Compact ## Images ![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - Image 1](https://m.media-amazon.com/images/I/71+jNF250SL.jpg) ![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - Image 2](https://m.media-amazon.com/images/I/719kjHi8DYL.jpg) ![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - Image 3](https://m.media-amazon.com/images/I/715Uw45a+5L.jpg) ![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - Image 4](https://m.media-amazon.com/images/I/71HBYuhEmJL.jpg) ![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - Image 5](https://m.media-amazon.com/images/I/71DPsZIf79L.jpg) ## Questions & Answers **Q: will this work for leakey gaskets?** A: It is designed to work on leaky gaskets. If you have a small leak this product might be an easy and cheap fix. It did not work for me. Perhaps my leak was too large. It is hard to tell. **Q: Does it discolor the antifreeze? Thanks** A: Unfortunately I can't say. I have a GM vehicle that uses the orangish color engine coolant and it and this product are so close in color it's hard to say if it would discolor the usual green-colored coolant found in non-GM vehicles. The other challenge is that I can only look at the coolant through an overflow reservoir and it's so dark when I look inside (I have to use an LED flashlight to see it adequately) that it would be hard to tell if there was any discoloration. **Q: Can you use this in a 2013 escape?** A: You can use it anywhere. It's kept my 1998 Chevy Lumina going over 2 years with almost 178,000 miles on it! **Q: can you mix this with barstop if you all ready put that in the radiator?** A: I did mix this with Irontite All Weather Seal. Did the K-seal first. Irontite a week later. Just to be sure. Since they both said it can remain in the system. Two weeks, still good. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***T on December 1, 2015* ### ⭐⭐⭐⭐⭐ Review *by R***. on September 12, 2025* ### ⭐⭐⭐⭐⭐ Review *by C***K on March 8, 2025* ## Frequently Bought Together - K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems - K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks --- ## 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.pl/products/5618885-k-seal-st5501-multi-purpose-one-step-permanent-coolant-leak](https://www.desertcart.pl/products/5618885-k-seal-st5501-multi-purpose-one-step-permanent-coolant-leak) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-02*