🔧 Seal leaks like a pro—fast, clear, and unstoppable!
Nu-Calgon 4050-05 EasySeal Ultimate SS is a concentrated, professional-grade leak sealant designed for HVAC systems up to 10 tons. Featuring a clear tube for visible application and compatibility with R-410A units without pump down, it’s perfect for split systems, heat pumps, and mini splits. Trusted by professionals worldwide for fast, effective, and reliable leak sealing.
| ASIN | B014T2K8WO |
| Batteries required | No |
| Best Sellers Rank | #545,402 in Automotive ( See Top 100 in Automotive ) #994 in Air Conditioning Line Repair Tools |
| Brand | Nu-Calgon |
| Color | clear |
| Customer Reviews | 4.1 4.1 out of 5 stars (42) |
| Global Trade Identification Number | 00681001405058 |
| Included Components | Single Nu-Calgon 4050-05 EasySeal Ultimate SS (0.1 oz. Vessel) |
| Item Form | Liquid |
| Item Weight | 0.16 ounces |
| Item dimensions L x W x H | 1 x 3 x 10 inches |
| Item model number | 4050-05 |
| Manufacturer | Nu-Calgon Wholesaler, Inc. |
| Material | Resin |
| Number of Items | 1 |
| Product Dimensions | 1 x 3 x 10 inches |
| Style | Compact |
| Surface Recommendation | Coils, Refrigerant Lines |
| UPC | 681001405058 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
S**E
Excellent Product
•Money Saver •Nice Features •Easy To Use •Well Made •Very Effective •Good Value •Fast Shipping Works As Advertised
D**4
Recommended
Best
A**X
DON'T BUY! SILENT COMPRESSOR KILLER - KILLED MY $2K UNIT
Added Nu-Calgon 4050-05 to fix a leak in my walk-in cooler (R449a system). Stopped the leak BUT murdered my compressor and TXV in 9 months. Technician confirmed sealant sludge choked the valves. This poison claims to 'fix' systems but actually DESTROYS them slowly. Cost me $3k+ in repairs vs. a $50 leak repair. WARNING: This isn't a fix -it's a $3,000 time bomb for your HVAC. Never again，You will also need to pay a high price for a thorough cleaning
K**G
Leak was too big for this sealer
I can’t say that I blame the sealer for the size leak I was trying to stop. It was a long shot. In my case it didn’t work. However, I have a very slow leak in another unit so I will try it again. Better than $7200 for a new unit.
R**X
Gave this the the AC service guy and he installed to fix a leak.
Product stopped the leak and seems to work. Purchase this product and gave it to the AC service guy to install with more Freon been working for 4 weeks now great leak free. Just make sure you don’t put too much of this in your unit. If you put too much in your unit can do more harm than good only install to match the ton size of your unit.
A**R
Goes in the low side
Worked great.No more leak
C**Y
I worked great.
I have put this in several customer’s units and seems to work great. One system had leak that we could not find and was adding 1 pound of 410 every 2 months. Haven’t had to put Freon in for over a year so far. I can’t say that it will always work but so far it has for my customers.
D**N
Didn't work.
Should have been nice to know the minimum refrigerant size before I bought it. Wasn't easy only doing half a tube. To me it seems like a waste of money.
Trustpilot
5 days ago
2 weeks ago
