---
product_id: 43345900
title: "Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons"
brand: "nu-calgon"
price: "€ 147.26"
currency: EUR
in_stock: true
reviews_count: 8
category: "Nu Calgon"
url: https://www.desertcart.com.cy/products/43345900-nu-calgon-4050-11-easyseal-direct-inject-uv-dye-refrigerant
store_origin: CY
region: Cyprus
---

# No pump down needed for R-410A units Concentrated formula treats 2-7.5 ton systems UV dye for instant leak detection Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons

**Brand:** nu-calgon
**Price:** € 147.26
**Availability:** ✅ In Stock

## Summary

> 💡 Seal leaks fast, save big, and stay leak-free with confidence!

## Quick Answers

- **What is this?** Nu-Calgon 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?** € 147.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/43345900-nu-calgon-4050-11-easyseal-direct-inject-uv-dye-refrigerant)

## 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

- • **Time & Cost Saver:** Eliminates costly coil replacements and lengthy downtime
- • **Visible Injection:** Clear tube lets you watch the sealant flow in real-time
- • **Powerful Leak Sealing:** Over a million leaks sealed with industry-leading formula
- • **Universal Compatibility:** Perfect for split systems, heat pumps, microchannel coils, and mini splits
- • **One-Time Use, Maximum Impact:** Single dose treats entire system efficiently

## Overview

Nu-Calgon EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant is a concentrated, one-time use formula designed to treat HVAC systems from 2 to 7.5 tons. Featuring a clear injection tube and integrated UV dye, it enables quick, visible application and leak detection without the need to pump down R-410A units. Trusted by professionals, it seals minor leaks efficiently across a wide range of refrigeration and cooling systems, saving time and costly repairs.

## 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 |
|---------------|-------|
| Customer Reviews | 4.3 out of 5 stars 355 Reviews |

## Images

![Nu-Calgon 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.

### ⭐⭐⭐⭐⭐ Three years and no leak! Retitled after three years
*by B***A on October 27, 2023*

We are in South Florida and I do our HVAC work since I did it for a living before retiring. We HAD a pinhole leak in the evap on our Lennox 2.5T. I was adding .5 lbs of 410a monthly. I keep a spare Lennox evap brand new in the garage but I was in cancer treatment and did not want to replace it. It's still there. I added one shot of Easy Seal. Now February 2026. In four months it'll be three years. No leaks! My leak detector does not even pick up the leak anymore. This product is not just a "seal". It plates over the leak. Nu-Calgon makes other HVAC products as well, for cleaning, etc... I tend to stick to their excellent products. Under the labeled conditions it does what it says! Great product! Little pinhole leak in the evap. I used this in June 2023. It is now February 2025. We live near Tampa Bay in Balm Florida. We have some summer days of 105° with a Reelfeel of 125°. I was losing .5 lbs per month up until June 2023. Since adding this product nineteenonths ago, no leaks. 2010 Rheem.14SEER 3.5T.

## Frequently Bought Together

- Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons
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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-13*