---
product_id: 213436787
title: "Leak Saver Direct Inject Ultimate 3-in-1 | AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak"
price: "฿5240"
currency: THB
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.th/products/213436787-leak-saver-direct-inject-ultimate-3-in-1-ac-refrigerant
store_origin: TH
region: Thailand
---

# 3-in-1 functionality Works with all refrigerants Easy installation Leak Saver Direct Inject Ultimate 3-in-1 | AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak

**Price:** ฿5240
**Availability:** ✅ In Stock

## Summary

> 🔒 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** Leak Saver Direct Inject Ultimate 3-in-1 | AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak
- **How much does it cost?** ฿5240 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/213436787-leak-saver-direct-inject-ultimate-3-in-1-ac-refrigerant)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seal Leaks Permanently:** Experience peace of mind with a permanent seal within 7 days!
- • **Universal Compatibility:** Compatible with all HVAC systems and refrigerants, including cars!
- • **Hassle-Free Installation:** Inject directly with ease—no mess, no fuss!
- • **Trusted by Professionals:** Join over 4 million satisfied users—quality you can trust!
- • **Moisture Remover Included:** Eliminate moisture while sealing leaks for optimal performance!

## Overview

The Leak Saver Direct Inject Ultimate 3-in-1 is a professional-grade AC refrigerant leak sealer that combines leak sealing, moisture removal, and UV dye detection in one easy-to-use package. Compatible with a wide range of HVAC systems and refrigerants, it ensures a permanent seal within 7 days, making it a trusted choice for both professionals and DIY enthusiasts alike.

## Description

Buy Leak Saver Direct Inject Ultimate 3-in-1 | AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak: Air Conditioning Line Repair Tools - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: quality - as described, easy installation and good value
Review: didn't break my system - I think I did over 10 hours of pure, uninterrupted research to find out whether this would clog and destroy my AC system or magically repair it. Here's what I found. For context, I have a newer type of heat pump that uses R-410a (Bosch BOVA36HDN1M120G) paired with an old high-velocity duct system (Unico MC3642HX) *Will this destroy my AC system? What various sources report is that organosilane, polymer-free leak sealants (like this one) are generally safe for new model heat pumps and will not "slug" or otherwise destroy sensitive components in modern machines. Supposedly, this is because they will only react and harden when exposed to the pressure and oxygen variations associated with getting outside of the closed refrigerant loop of your system (i.e., when exposed to an actual hole). Leak sealants (generally) apparently got a very bad rap in the 2000s because they used to be polymer-based which, when introduced into systems like mine, immediately caused problems with sensitive (apparently "microscopic") valves and whatnot that modern heat pumps use to regulate the flow of refrigerant. They can also apparently cause problems when other contaminants like air or water have already entered the system, causing the leak sealant to trigger earlier within the refrigerant line instead of at the leak site, resulting in issues when the refrigerant flow constricts. I agonized about what to do because I had a leak in my system that took 2 years to allow enough refrigerant to escape to make my heat pump lock out (what most would describe as a micro leak). For reference, in my area (a HCOL suburb), multiple HVAC companies said that their go-to in my situation would be to pull all the refrigerant out, separate my system into indoor coil, piping and outdoor unit, and then do a nitrogen test to find the leak. It apparently would take about half a day to do this process, and I was quoted about $200/hr of labor during high-season (December). And that was to find the leak only. Additional costs would then be tacked on for repair which, by the way, if you have an R-410a system like mine, may not be viable if the leak is in your coil because R-410a is being phased out. And even more costs would come into play if the leak wasn't somewhere easily accessible, like inside walls or ceilings. There are some products that apparently can electronically detect leaks, but it was a chore to get HVAC techs (from multiple companies) to even mention this option. I imagine there's some self-interest at play there, but those leak detectors are also available online if you are inclined to try them. Putting all that together, I asked one of the HVAC workers visiting me to give his real thoughts on the sealant. Off the record, he said the official line is that it's not recommended (injecting anything into your refrigerant line will immediately void any warranties you might have on your unit), but that the end result would either a fix or nothing. He said he would advise just refilling periodically, and getting a can of R-410a somewhere (since these are being phased out, with the expectation that prices go up over time, like they did for R-22). I decided to trust in internet research and go for it, and had the tech add in the sealant for me (I saw some videos online claiming that this process was straightforward, but also multiple videos where people added this into the wrong pressure line, resulting in it exploding in their hands, or adding it with too much or too little air). I then ran the system in cold mode for 3 hours, and then ran it at a moderate heating mode constantly since then. The system is still working fine. I don't know if the leak sealant has worked or not, but the system itself has been fine for about a month now. If you decide to take the risk that I did, I suggest you check the SDS sheet for the product you choose. The one for this one is available here (https://www.leaksavers.com/apps/help-center) under the "Leak Saver Installation Help" category, and make sure you are also getting a "polymer-free" organosilane leak sealant as opposed to one of the older polymer-based sealants still floating around (especially at big box stores). Otherwise, good luck. Ultimately, I think this is one of those things that you just have to take a leap of faith on, because all reputable HVAC companies will give you the same party line about this not being an approved product, and all technicians will generally repeat that mantra. The only thing I can say is that it did not immediately kill my system (parts mentioned above).

## Features

- 3-IN-1 SEALANT + MOISTURE REMOVER + UV DYE – Our proven leak sealant now includes moisture remover and UV dye for the complete system treatment! Now, you can seal your leak, remove system moisture, or find large leaks with the UV Dye...all in one easy to install package!
- STOP LEAKS PERMANENTLY - The Leak Saver can permanently seal refrigerant leaks where the complete refrigerant charge is not lost within 7 days. When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak. When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks
- WORKS WITH ALL SYSTEMS & REFRIGERANTS INCLUDING CARS - Our product is compatible with all systems, refrigerants (except ammonia), car refrigerants, and oils. It is great for central air conditioners, automotive air conditioners, refrigerators, ductless mini-splits, heat pumps, geothermal heat pumps, commercial refrigeration systems, micro channel coils and more. It also works with all refrigerants including R410A Freon, R22 and replacements, R134A , r1234yf, R404A, R290, R600a, and more
- STRAIGHTFORWARD INSTALLATION - No more fussing with messy syringes, hoses, or pressurized cans. The Leak Saver HVAC sealant injects directly and easily into the system with a basic manifold gauge set or even easier with our Leak Shot Injection Kits. NOTE: for automotive systems, you will still need the standard 134A to 1/4” charging adapter. Mini-splits may require a 5/16” to 1/4” charging adapter. You can see our straightforward installation videos below
- SAFE FOR ALL TOOLS AND PARTS - Our HVAC leak sealer is safe for all manifold gauges, hoses, expansion valves (TXVs, TEVs, capillary tubes, etc), Schrader valves, and anything needed to service your system. Adapter required for mini splits (5/16" to 1/4") and automotive systems ( 134A to 1/4")
- THE MOST TRUSTED - The numbers don’t lie! With more than 4,000,000 units sold of our air conditioner leak sealer formula since 2015, we are the most trusted leak sealant among HVAC professionals. Proudly made in the USA. We stand 100% behind the quality of our products. If for any reason you are not satisfied with your order, reach out to us and we will make it right.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Leak Saver |
| Brand | Leak Saver |
| Item Weight | 3.2 ounces |
| Package Dimensions | 8.9 x 1.9 x 0.6 inches |
| Country of Origin | USA |
| Manufacturer Part Number | LS-05ULT-MFN |

## Images

![Leak Saver Direct Inject Ultimate 3-in-1 | AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak - Image 1](https://m.media-amazon.com/images/I/71hmVBx7pBL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ quality
*by A***R on February 19, 2026*

as described, easy installation and good value

### ⭐⭐⭐⭐⭐ didn't break my system
*by H***P on January 12, 2026*

I think I did over 10 hours of pure, uninterrupted research to find out whether this would clog and destroy my AC system or magically repair it. Here's what I found. For context, I have a newer type of heat pump that uses R-410a (Bosch BOVA36HDN1M120G) paired with an old high-velocity duct system (Unico MC3642HX) *Will this destroy my AC system? What various sources report is that organosilane, polymer-free leak sealants (like this one) are generally safe for new model heat pumps and will not "slug" or otherwise destroy sensitive components in modern machines. Supposedly, this is because they will only react and harden when exposed to the pressure and oxygen variations associated with getting outside of the closed refrigerant loop of your system (i.e., when exposed to an actual hole). Leak sealants (generally) apparently got a very bad rap in the 2000s because they used to be polymer-based which, when introduced into systems like mine, immediately caused problems with sensitive (apparently "microscopic") valves and whatnot that modern heat pumps use to regulate the flow of refrigerant. They can also apparently cause problems when other contaminants like air or water have already entered the system, causing the leak sealant to trigger earlier within the refrigerant line instead of at the leak site, resulting in issues when the refrigerant flow constricts. I agonized about what to do because I had a leak in my system that took 2 years to allow enough refrigerant to escape to make my heat pump lock out (what most would describe as a micro leak). For reference, in my area (a HCOL suburb), multiple HVAC companies said that their go-to in my situation would be to pull all the refrigerant out, separate my system into indoor coil, piping and outdoor unit, and then do a nitrogen test to find the leak. It apparently would take about half a day to do this process, and I was quoted about $200/hr of labor during high-season (December). And that was to find the leak only. Additional costs would then be tacked on for repair which, by the way, if you have an R-410a system like mine, may not be viable if the leak is in your coil because R-410a is being phased out. And even more costs would come into play if the leak wasn't somewhere easily accessible, like inside walls or ceilings. There are some products that apparently can electronically detect leaks, but it was a chore to get HVAC techs (from multiple companies) to even mention this option. I imagine there's some self-interest at play there, but those leak detectors are also available online if you are inclined to try them. Putting all that together, I asked one of the HVAC workers visiting me to give his real thoughts on the sealant. Off the record, he said the official line is that it's not recommended (injecting anything into your refrigerant line will immediately void any warranties you might have on your unit), but that the end result would either a fix or nothing. He said he would advise just refilling periodically, and getting a can of R-410a somewhere (since these are being phased out, with the expectation that prices go up over time, like they did for R-22). I decided to trust in internet research and go for it, and had the tech add in the sealant for me (I saw some videos online claiming that this process was straightforward, but also multiple videos where people added this into the wrong pressure line, resulting in it exploding in their hands, or adding it with too much or too little air). I then ran the system in cold mode for 3 hours, and then ran it at a moderate heating mode constantly since then. The system is still working fine. I don't know if the leak sealant has worked or not, but the system itself has been fine for about a month now. If you decide to take the risk that I did, I suggest you check the SDS sheet for the product you choose. The one for this one is available here (https://www.leaksavers.com/apps/help-center) under the "Leak Saver Installation Help" category, and make sure you are also getting a "polymer-free" organosilane leak sealant as opposed to one of the older polymer-based sealants still floating around (especially at big box stores). Otherwise, good luck. Ultimately, I think this is one of those things that you just have to take a leap of faith on, because all reputable HVAC companies will give you the same party line about this not being an approved product, and all technicians will generally repeat that mantra. The only thing I can say is that it did not immediately kill my system (parts mentioned above).

### ⭐⭐⭐⭐ Made my leak worse
*by A***2 on March 2, 2026*

Quick update - this seller did a great job from a customer service perspective. They made the situation right. It is great to know that there are still products and manufacturers that guarantee your satisfaction with their products! What a bummer! I've been a big fan of Leak Saver products until this one. I've used the Leak Savor Direct Inject UV Dye and Leak Sealer on 4 heat pumps over the past 5 years had had 50/50 mixed results. Now that I've used this product on another older heat pump at a second home, I have to say that I'm no longer sold this stuff works. I also have to say that I have "suffered" silently as I have had several issues with the product including a multipack that had broken "pipes" of the leak sealant in the bag to now this "Ultimate 3-in-1" actually making my leak much worse. The problem with the multipacks are that the contents are hidden until you open them. Unless you are going to do that before the return period you don't know if you have a damaged and/or defective product. In the latter case, this Ultimate formulation took me from having a leak that lasted a month before dropping out the pressure switch to a leak that was significantly bad enough that it only took 3 days for that to happen. I cannot tell if it gummed up the TXV to make it worse or what but suffice to say my hail mary didn't work and I'm now having to replace a heat pump.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-29*