--- product_id: 253648056 title: "STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml)" brand: "stp" price: "€ 21.72" currency: EUR in_stock: true reviews_count: 9 category: "Stp" url: https://www.desertcart.hr/products/253648056-stp-gst96300en06-radiator-sealer-permanently-seals-leaks-treatment-300-ml store_origin: HR region: Croatia --- # Water pump lubrication Permanent leak seal Corrosion inhibitor STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) **Brand:** stp **Price:** € 21.72 **Availability:** ✅ In Stock ## Summary > 🔥 Seal leaks fast, drive worry-free! 🏎️ ## Quick Answers - **What is this?** STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) by stp - **How much does it cost?** € 21.72 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/253648056-stp-gst96300en06-radiator-sealer-permanently-seals-leaks-treatment-300-ml) ## Best For - stp enthusiasts ## Why This Product - Trusted stp brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Leak Repair:** Seals radiator leaks quickly and permanently, so you never miss a beat on the road. - • **Rust & Scale Defense:** Built-in corrosion inhibitors protect your cooling system from damaging rust and buildup. - • **Universal Compatibility:** Works flawlessly with all radiator types and antifreeze formulas—one solution fits all. - • **Smooth Engine Performance:** Lubricates the water pump to keep your engine running quietly and efficiently. - • **UK-Made Quality Assurance:** Proudly manufactured in the UK, ensuring premium reliability and performance. ## Overview STP GST96300EN06 Radiator Sealer is a 300ml treatment designed to permanently seal radiator leaks, compatible with all radiator types and antifreeze. It includes corrosion inhibitors to prevent rust and scale buildup while lubricating the water pump for smooth operation. Made in the UK, it treats cooling systems up to 14 liters, restoring system integrity quickly and effectively. ## Description From the manufacturer STP GST96300EN06 Radiator Sealer STP Radiator Sealer is designed to repair radiator leaks quickly and effectively, forming a permanent seal. It contains corrosion inhibitors to help prevent the formation of rust and deposits. STP Radiator Sealer also lubricates the water pump. Directions Run the engine until the coolant is warm (not hot). Shake bottle well & pour entire bottle of STP Radiator Sealer into radiator. Run the engine for approximately 10 minutes or drive a short distance, allowing seal to harden. Be careful when opening the radiator/cooling system: hot coolant or steam might escape. One bottle treats cooling systems up to 14 liters capacity. Review: Works well - Perfect for small leaks Review: منتج - مشكله مندوب توصيل لم يسلم باقي مبلغ منتج ممتاز جدآ ## Features - Suitable for all types of radiator - Compatible with all types of antifreeze - Safe for rubber hoses - Proudly made in the UK - Seals radiator leaks promptly, restoring the cooling system's integrity - Includes corrosion inhibitors to prevent rust and scale buildup - Lubricates the water pump, ensuring smooth operation ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00W1L74GY | | Best Sellers Rank | #536 in Automotive ( See Top 100 in Automotive ) #6 in Automotive Fillers, Adhesives & Sealants | | Brand | STP | | Customer Reviews | 4.2 4.2 out of 5 stars (49) | | Date First Available | 12 March 2016 | | Item Weight | 360 g | | Item model number | GST96300EN06 | | Manufacturer | MOTORMEDIC | | Manufacturer Part Number | GST96300EN06 | | Model | Sealer | | Product Dimensions | 7.8 x 4.3 x 14.7 cm; 360 g | ## Images ![STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) - Image 1](https://m.media-amazon.com/images/I/611Ptxmj75L.jpg) ![STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) - Image 2](https://m.media-amazon.com/images/I/81RQBo+vJ5L.jpg) ![STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) - Image 3](https://m.media-amazon.com/images/I/41wpDzXvZ1L.jpg) ![STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) - Image 4](https://m.media-amazon.com/images/I/51ngbCY7a0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well *by J***D on 29 August 2025* Perfect for small leaks ### ⭐⭐⭐⭐⭐ منتج *by ب***ب on 29 June 2026* مشكله مندوب توصيل لم يسلم باقي مبلغ منتج ممتاز جدآ ### ⭐⭐⭐ Not 100% effective *by H***A on 14 December 2023* Leakage reduced to a smaller amount of coolant but not stopped completely ## Frequently Bought Together - STP GST96300EN06 Radiator Sealer Permanently Seals Leaks Treatment (300 Ml) - Turbo Radiator Coolant Green 1Gln - STP - GST95300EN06 Radiator Flush Cleans Cooling System (300 ml) --- ## 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.hr/products/253648056-stp-gst96300en06-radiator-sealer-permanently-seals-leaks-treatment-300-ml](https://www.desertcart.hr/products/253648056-stp-gst96300en06-radiator-sealer-permanently-seals-leaks-treatment-300-ml) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-21*