--- product_id: 11686228 title: "Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required" brand: "unknown" price: "34896CFA" currency: XOF in_stock: true reviews_count: 3 url: https://www.desertcart.sn/products/11686228-solv-tec-inc-st5516-16oz-k-seal-tm-heavy-duty store_origin: SN region: Senegal --- # One-step, no flushing needed Heavy-duty for large engines Seals leaks in minutes Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required **Brand:** unknown **Price:** 34896CFA **Availability:** ✅ In Stock ## Summary > 🚀 Fix leaks fast, drive worry-free with K-Seal ST5516! ## Quick Answers - **What is this?** Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required by unknown - **How much does it cost?** 34896CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/11686228-solv-tec-inc-st5516-16oz-k-seal-tm-heavy-duty) ## Best For - unknown enthusiasts ## Why This Product - Trusted unknown brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Leak Fix:** Permanently seals radiator, head gasket, freeze plugs & more in minutes - • **Effortless Application:** Shake, pour & go—no draining or flushing required - • **Heavy-Duty Reliability:** Engineered for commercial, agricultural & industrial engines - • **Universal Compatibility:** Works seamlessly with all antifreeze types for any vehicle - • **Mechanic-Trusted Formula:** Non-corrosive, clog-free, ASTM D3147 verified for lasting performance ## Overview The Solv-Tec ST5516 K-Seal is a professional-grade, heavy-duty coolant leak repair solution that permanently seals cracks and holes in water-cooled engines. Compatible with all antifreeze types, it requires no system draining or flushing—just shake, pour, and go. Trusted by mechanics and independently tested to ASTM standards, it’s designed for large commercial and agricultural vehicles, delivering fast, reliable, and clog-free performance to extend engine life. ## Description Experience the ultimate solution to coolant leaks with the K-Seal ST5516 HD, 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. This heavy-duty sealer was designed specifically for HGVs, tractors, heavy plant and other commercial vehicles. The K-Seal ST5516 HD, 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 ST5516 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. Review: A+ - This is great Review: works great - good product ## 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 of heavy duty vehicles. Fixes most leaks in water-cooled engines - STOP HOLES & CRACKS: With 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 & requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid to your coolant system & run your engine as normal - HEAVY DUTY PERFORMANCE: Engineered for large engines & industrial use; suitable for commercial or agricultural vehicles. A permanent repair for the lifetime of the engine. Compatible with all types of antifreeze coolant - PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our non-corrosive sealer delivers a durable & long-lasting repair, without clogging your cooling system. 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 | B00SXGL2C8 | | Best Sellers Rank | #994,639 in Automotive ( See Top 100 in Automotive ) #116 in Cooling System Additives | | Brand | Unknown | | Brand Name | Unknown | | Compatible Material | Glass, Metal, Plastic, Rubber | | Customer Reviews | 5.0 out of 5 stars 8 Reviews | | Item Form | Liquid | | Item Weight | 16 Ounces | | Manufacturer | netmagic | | Material | Silicone | | Material Type | Silicone | | Model | DAS16819 | | Number of Items | 1 | | Part Number | ST5516 | | Style | Compact | | Style Name | Compact | | Unit Count | 1 Count | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Unknown - **Item Form:** Liquid - **Item Weight:** 16 Ounces - **Style:** Compact - **Water Resistance Level:** Water Resistant ## Images ![Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty 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/71z2kx2l+vL.jpg) ![Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty 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/712LuWdp7kL.jpg) ![Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty 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/61P1CX36BUL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A+ *by E***. on December 3, 2025* This is great ### ⭐⭐⭐⭐⭐ works great *by S***I on August 29, 2025* good product ### ⭐⭐⭐⭐⭐ Excellent!!! *by A***R on July 11, 2025* I will say this, I put this in my coolant reservoir and 20 minutes later then an hour later then 2 Days Later no leak the reservoir is still full. Keep in mind every week I will check my coolant level and there would be NON in there but now everything is as it should be. I think this is the one and only product you will need for the seal and fix of leaks in your engine. Some of the others on the market may work but not like this. It's easy just put it in and GO!!!! ## Frequently Bought Together - Solv-Tec Inc. ST5516 16oz. K-Seal TM Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - 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.sn/products/11686228-solv-tec-inc-st5516-16oz-k-seal-tm-heavy-duty](https://www.desertcart.sn/products/11686228-solv-tec-inc-st5516-16oz-k-seal-tm-heavy-duty) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-06-01*