We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.
DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
🔧 Seal leaks like a pro—fast, flawless, and foolproof!
Nu-Calgon 4050-11 EasySeal Ultimate LS/UV is a professional-grade leak sealant designed for rapid, permanent sealing of large leaks in HVAC and refrigeration systems. Featuring advanced rapid fusion technology and a brighter UV dye for easy leak detection, it works with all refrigerants and systems up to 10 tons. Trusted by technicians for its ease of use and reliable performance, this 0.1 oz vessel delivers a quick, mess-free solution to keep your cooling systems running flawlessly.
| ASIN | B07LBGHT6Q |
| Batteries Required? | No |
| Best Sellers Rank | #365,768 in Automotive ( See Top 100 in Automotive ) #79 in Refrigerants |
| Customer Reviews | 4.1 4.1 out of 5 stars (22) |
| Date First Available | December 12, 2018 |
| Included Components | Single Nu-Calgon 4050-11 EasySeal Ultimate LS/UV (0.1 oz. Vessel) |
| Item Package Quantity | 1 |
| Item Weight | 3.98 ounces |
| Item model number | 4050-11 |
| Manufacturer | Nu-Calgon |
| Part Number | 4050-11 |
| Product Dimensions | 0.75 x 0.75 x 9.5 inches |
| Usage | Leak Sealant |
B**.
This is effective and easy to apply
This product delivers. It was pumped into A/C system that had a leak, compromising the quantum of cool air being released. Once it was pumped in, the cool air became steady and even, responding to the thermostat. If your A/C system has a slow leak, get it; it will fix it. It is easy. Just follow the directions.
J**9
Got my AC back up and running
I bought this product based on what the AC tech told me he uses. I used this product and charged my AC in July of 2023 and it worked all season. It is now June 2024 and my AC is still ice cold. This product definitely sealed the leak.
J**7
$80 vs $5000
So if you have determined that you have a relatively small leak, ( not for large leaks) after the second time putting this product it worked and is still working. Learn from my mistake. Be sure to fill the system with the required gas ( Freon )to its capacity for good results! Remember this is a temporary fix and will give you time to plan for your replacement . They are getting more expensive by the day!
L**3
Snake Oil
Totally ineffective on a very slow leak. 1 lb in 1 yr. No change in leak rate as evidenced by soap bubble test and electronic leak detector. Even the UV test failed to show the leak! Unbelievable Snake Oil. Sadly no refund for this fraudulent product
A**S
Sealer
Didn't work for me at all
Trustpilot
1 month ago
5 days ago