---
product_id: 69107216
title: "28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)"
brand: "tsi supercool"
price: "KD 14.87"
currency: KWD
in_stock: true
reviews_count: 8
category: "Tsi Supercool"
url: https://www.desertcart.com.kw/products/69107216-28399-hvac-leak-stop-syringe-with-application-hose-2-fl
store_origin: KW
region: Kuwait
---

# Universal fit, no system damage 2 fl. oz. precision syringe Treats up to 6-ton HVAC units 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)

**Brand:** tsi supercool
**Price:** KD 14.87
**Availability:** ✅ In Stock

## Summary

> ❄️ Seal leaks, save money, and chill with confidence!

## Quick Answers

- **What is this?** 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL) by tsi supercool
- **How much does it cost?** KD 14.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/69107216-28399-hvac-leak-stop-syringe-with-application-hose-2-fl)

## Best For

- tsi supercool enthusiasts

## Why This Product

- Trusted tsi supercool brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Corrosion Defense:** Additive package protects your system from future rust and wear
- • **Permanent Leak Seal:** Stops leaks up to 30mm for lasting HVAC peace of mind
- • **System Safe Formula:** Polymer-free and compatible with all lubricants and refrigerants
- • **Eco-Conscious Choice:** Biodegradable lubricants from a responsible manufacturer
- • **Noise Reduction & Longevity:** Reduces compressor noise while extending HVAC lifespan

## Overview

The TSI Supercool 28399 HVAC Leak Stop Syringe is a 2 fl. oz. universal-fit solution designed to permanently seal leaks up to 30mm in A/C and refrigeration systems up to 6 tons. Its polymer-free formula ensures no harm to system components while protecting against corrosion and reducing compressor noise. Compatible with all lubricants and refrigerants, it extends HVAC life and supports eco-friendly maintenance.

## Description

HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose will treat up to a 6-ton unit. It includes a reusable application hose. It permanently seals leaks 30mm and smaller in A/C and refrigeration systems. It does NOT contain polymers and will NOT harm A/C system or components. It Includes an additive package that protects against future corrosion. It is compatible with all lubricants and refrigerants. It both reduces compressor noise and extends life. TSI Supercool offers biodegradable lubricants that put us on the forefront of responsible manufacturing.

Review: Spend the extra $30 on a HVAC Dye injector! The stock syringe isn't up to the task. - Long story short, this product is so much easier to inject using an HVAC dye injector. A nice metal one is available for $30 on desertcart. I have no idea why it doesn't ship with one or that the manufacturer doesn't recommend it. They really should! The syringe it comes with sits near the edge of structural failure and needs modifications to even work! Short story long, my uncle fixes people's HVAC on the side for cheap. He swears by this stuff as the first response to slow leaks. However, the directions/videos on how to use this product are a joke. They show technicians just injecting the stuff easily and quickly in 30 seconds. This is not going to happen if you use the syringe. The pressure inside an R410a system is near 150 PSI. For me to use the syringe, I had to first stop the plunger from bending by sticking pieces of extra plastic around it so it would not bend. I had to use a washer on the front to stop the caulk gun from destroying the syringe front. Then I needed an extra clamp to help close and hold the caulk gun handle. Even then, I could only inject about a hair's width worth every 5 minutes. If I clamped it and let it sit, the system would eventually pull some out of the syringe, and I could repeat this. Before I could get this to work, the check valves were both locked up. I had to extend the Schrader valve trigger on the front valve and poke out the rear check valve because the tubing had excessive pressure that had them locked up. This was extremely dangerous. When it release it sounded like a gunshot and sent the Allen wrench I poked it with flying out of sight. I nearly got a hydraulic injection wound from a stream of this blue stuff! Do not try this! Once I was able to get the blue stuff flowing again, the issue was that the syringe would always come loose because it only needs one turn to start leaking, so about 3/4 of the product ended up on the ground as I messed with it. I ordered another tube because they are only $20. I also ordered a metal HVAC dye injector for $32 off desertcart. It just opened it all the way, squirted the blue stuff in, closed it, and bled out the air until blue came out the tube end. I connected it and turned it a half turn every 10-15 seconds until it was empty. So much easier, no waste, and much safer! Please just spend the extra money to inject this, especially if it has a chance of working. $55 is much cheaper than $500 or $5000.
Review: This legitimately saved me $3000 on a new unit! - I was getting ready to sell my house and had just replaced the downstairs outside A/C unit. $3000. 2 weeks before sale, I got a leak in my HVAC. Had an HVAC tech come out and service it, he thought it just needed freon. Took less than 2 days for all that to leak out and downstairs ceased cooling again. Had him come out again and he said it would be another $3000 to replace the HVAC. I wasn't trying to pay 3 grand so the next owners of my house could be super comfortable so I searched and found this product. Followed the directions to a tee and within a few hours, the downstairs unit was holding steady at 69 degrees and is still working fine to this day according to the new owners. Total lifesaver and easy on the wallet.

## Features

- 2-Ounce Syringe Treats Up to 6 Ton Units. Fit Type: Universal Fit — NOT FOR AUTOMOTIVE USE --
- Permanently Seals Leaks in A/C and Refrigeration Systems
- Does Not Contain Polymers, Will Not Harm A/C System Or Components
- Additive Package Protects Against Future Corrosion
- Compatible with All Lubricants and Refrigerants

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BH9Y9RC |
| Best Sellers Rank | #102,749 in Automotive ( See Top 100 in Automotive ) #179 in Air Conditioning Line Repair Tools |
| Brand | TSI Supercool |
| Brand Name | TSI Supercool |
| Customer Reviews | 3.8 out of 5 stars 344 Reviews |
| Global Trade Identification Number | 00672264028399 |
| Included Components | TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL) |
| Item Type Name | TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL) |
| Item Volume | 2 Fluid Ounces |
| Item Weight | 2 Ounces |
| Manufacturer | TSI Supercool |
| Material | Plastic |
| Sterile | Sterile |
| Sterility Rating | Sterile |
| UPC | 672264028399 |
| Unit Count | 2.0 Fluid Ounces |
| Warranty Description | manufacturer warranty |

## Product Details

- **Brand:** TSI Supercool
- **Item Volume:** 2 Fluid Ounces
- **Material:** Plastic
- **Sterility Rating:** Sterile
- **Unit Count:** 2.0 Fluid Ounces

## Images

![28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL) - Image 1](https://m.media-amazon.com/images/I/81vgeD2DJ2L.jpg)

## Available Options

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

## Questions & Answers

**Q: Is there any risk in using "too much"?  I only have a 3 ton system.  Any risk in using all of it?**
A: Really depends on the type of system you have. But for the most part I would not use more than two applications in a year. If your system uses an expansion valve it may stop it up. I got tired of my system and started using the LG dual inverter AC unit. It uses one third of the electricity and saves me about $250 a month.

**Q: Puedo usar este producto para sellar una fuga en el sistema de aire acondicionado del carro?**
A: No me lo recomiendo.

**Q: Does this work with 410A systems?**
A: It should work with any refrigerant system. Be patient installing it. Do not use it all on small systems. It doesn't say that anywhere on the package. It does says that it's enough for a 6 ton AC unit. That being said, don't use it all on a 9 ounce system.

**Q: Can it be used on automotive r134a a/c systems?**
A: No, it is for stationary HVAC-R systems.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Spend the extra $30 on a HVAC Dye injector! The stock syringe isn't up to the task.
*by K***D on May 1, 2023*

Long story short, this product is so much easier to inject using an HVAC dye injector. A nice metal one is available for $30 on Amazon. I have no idea why it doesn't ship with one or that the manufacturer doesn't recommend it. They really should! The syringe it comes with sits near the edge of structural failure and needs modifications to even work! Short story long, my uncle fixes people's HVAC on the side for cheap. He swears by this stuff as the first response to slow leaks. However, the directions/videos on how to use this product are a joke. They show technicians just injecting the stuff easily and quickly in 30 seconds. This is not going to happen if you use the syringe. The pressure inside an R410a system is near 150 PSI. For me to use the syringe, I had to first stop the plunger from bending by sticking pieces of extra plastic around it so it would not bend. I had to use a washer on the front to stop the caulk gun from destroying the syringe front. Then I needed an extra clamp to help close and hold the caulk gun handle. Even then, I could only inject about a hair's width worth every 5 minutes. If I clamped it and let it sit, the system would eventually pull some out of the syringe, and I could repeat this. Before I could get this to work, the check valves were both locked up. I had to extend the Schrader valve trigger on the front valve and poke out the rear check valve because the tubing had excessive pressure that had them locked up. This was extremely dangerous. When it release it sounded like a gunshot and sent the Allen wrench I poked it with flying out of sight. I nearly got a hydraulic injection wound from a stream of this blue stuff! Do not try this! Once I was able to get the blue stuff flowing again, the issue was that the syringe would always come loose because it only needs one turn to start leaking, so about 3/4 of the product ended up on the ground as I messed with it. I ordered another tube because they are only $20. I also ordered a metal HVAC dye injector for $32 off Amazon. It just opened it all the way, squirted the blue stuff in, closed it, and bled out the air until blue came out the tube end. I connected it and turned it a half turn every 10-15 seconds until it was empty. So much easier, no waste, and much safer! Please just spend the extra money to inject this, especially if it has a chance of working. $55 is much cheaper than $500 or $5000.

### ⭐⭐⭐⭐⭐ This legitimately saved me $3000 on a new unit!
*by S***S on June 30, 2022*

I was getting ready to sell my house and had just replaced the downstairs outside A/C unit. $3000. 2 weeks before sale, I got a leak in my HVAC. Had an HVAC tech come out and service it, he thought it just needed freon. Took less than 2 days for all that to leak out and downstairs ceased cooling again. Had him come out again and he said it would be another $3000 to replace the HVAC. I wasn't trying to pay 3 grand so the next owners of my house could be super comfortable so I searched and found this product. Followed the directions to a tee and within a few hours, the downstairs unit was holding steady at 69 degrees and is still working fine to this day according to the new owners. Total lifesaver and easy on the wallet.

### ⭐ Failed water 11 lbs 410a and a whole day plus price of the stupid things
*by J***. on March 13, 2025*

I've used this product twice now. Let me just say garbage plastic please redesign this looked very bad when my customer was watching me. Finished the pump down and then the plunger snaps in half with little effort 😕 Theeennnnvit wouldn't go into the unit! So I had to fill my hoses with it and open my gauges to inject the system. Running tho was a tiny micro leak plan to check next year to see if it lasts

## Frequently Bought Together

- TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)
- InterDynamics Certified A/C Pro Car Air Conditioner Leak Detector Dye, Detection UV Dye Detects Leaks in R-12 and R-134A Condition Systems, 1 Oz

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-04*