--- product_id: 43345900 title: "4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons" brand: "nu-calgon" price: "$146.24" currency: USD in_stock: true reviews_count: 8 category: "Nu Calgon" url: https://www.desertcart.us/products/43345900-4050-11-easyseal-direct-inject-uv-dye-refrigerant-leak-sealant store_origin: US region: United States of America --- # No pump down needed for R-410A units Concentrated formula, less product needed UV dye for instant leak detection 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons **Brand:** nu-calgon **Price:** $146.24 **Availability:** ✅ In Stock ## Summary > 💡 Seal smarter, not harder—stop leaks before they stop you! ## Quick Answers - **What is this?** 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons by nu-calgon - **How much does it cost?** $146.24 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/43345900-4050-11-easyseal-direct-inject-uv-dye-refrigerant-leak-sealant) ## Best For - nu-calgon enthusiasts ## Why This Product - Trusted nu-calgon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **See It Work:** Clear injection tube lets you visually confirm the sealant entering the system—no guesswork involved. - • **Skip the Pump Down:** Innovative direct inject system eliminates the need to pump down R-410A units, saving you time and hassle. - • **Seal with Precision:** Concentrated formula means you use less sealant, maximizing efficiency and minimizing waste. - • **Trusted Performance:** Proven over a million leaks sealed with a one-time use formula that keeps your system running smoothly. - • **Versatile Compatibility:** Perfectly engineered for split systems, heat pumps, microchannel coils, packaged units, and mini splits—one sealant to rule them all. ## Overview Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant is a powerful, concentrated sealant combined with UV dye for quick leak detection. Designed for systems 2 to 7.5 tons, it works without the need to pump down R-410A units and is compatible with a wide range of HVAC systems. Made in the USA, this one-time use product has sealed over a million leaks, offering fast, reliable repairs that save time and costly replacements. ## Description Now made in the U. S. A. , Easy Seal Direct Inject is the strongest sealant on the market, with over a million leaks sealed. With this new injection system, pumping down the unit is a thing of the past. And now the industry's leading refrigeration sealant has been combined with UV leak detection dye to give you Easy Seal Direct Inject-UV. Review: It works for pinhole leaks, not pinheaded wannabe techs! - I’ve used this product over a dozen times as a certified HVAC technician. Only once has it not worked and it took several months to lose the refrigerant again. If you’re trying to stop a MINOR leak and you have lost half your refrigerant (example 50 psi or less for R22 and 70 psi or less for R410A), don’t expect this product to work. Use common sense! Review: Great price and quick repair - Great, ease to add into the system and worked really quick to seal small hole in the coil. Excellent value and saved time and money of a coil replacement. ## Features - Concentrated formula means less material in system - Clear tube so you can see the sealant go in - No need to pump down R-410A units - Perfect for split systems, heat pumps, microchannel coils, packaged units, and mini splits - One time use - Leak Sealant ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B072Q3MX47 | | Best Sellers Rank | #31,018 in Automotive ( See Top 100 in Automotive ) #91 in Air Conditioning Line Repair Tools | | Date First Available | June 1, 2017 | | Is Discontinued By Manufacturer | No | | Item Weight | 0.16 ounces | | Item model number | 4050-11 | | Manufacturer | Nu-Calgon Wholesaler, Inc. | | Product Dimensions | 9.7 x 3 x 1.5 inches | ## Images ![4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons - Image 1](https://m.media-amazon.com/images/I/51kJOZZkRVL.jpg) ## Questions & Answers **Q: Is this good for r22** A: you can use on R22 also yes, it works on all refrigerants. **Q: What will happen if used on a 1-ton system?** A: You will probably be putting too much in. They make a smaller dosage unit, but it doesn't have the dye in it. You can get a dye injector and inject the dye separately. You can use the smaller unit on automotive applications. The company is in St. Louis, MO and I had called their tool free number. Very Helpful. **Q: Can I use this sealer in an empty mini split using pressurized nitrogen?** A: Needs to be installed when charging the system as it needs to circulate for about an hour with system running after fully charged **Q: Does the dye allow easy spotting of the leak location?** A: hopefully ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works for pinhole leaks, not pinheaded wannabe techs! *by R***. on September 20, 2025* I’ve used this product over a dozen times as a certified HVAC technician. Only once has it not worked and it took several months to lose the refrigerant again. If you’re trying to stop a MINOR leak and you have lost half your refrigerant (example 50 psi or less for R22 and 70 psi or less for R410A), don’t expect this product to work. Use common sense! ### ⭐⭐⭐⭐⭐ Great price and quick repair *by C***C on November 17, 2025* Great, ease to add into the system and worked really quick to seal small hole in the coil. Excellent value and saved time and money of a coil replacement. ### ⭐⭐⭐⭐⭐ found the leak!! *by J***O on July 9, 2024* I was hoping this product would've found the leak and seal it. The leak must've been too large for this product. It started clumping around the leak, so I had high hope. I was able to easily find it, in the inside unit evaporator coil, on a U bend. Had a buddy come over and brazed the leak. Good as new. ## Frequently Bought Together - Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons - REALHUNLEE Auto Air Conditioner Leak Detector Tool Flashlight Oil AC UV Dye Leak Test Detection Kit Pro 68 LED Flashlight with UV Protective Glasses - Leak Saver Direct Inject UV - Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks - for AC, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants --- ## 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/43345900-4050-11-easyseal-direct-inject-uv-dye-refrigerant-leak-sealant](https://www.desertcart.us/products/43345900-4050-11-easyseal-direct-inject-uv-dye-refrigerant-leak-sealant) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-13*