---
product_id: 296340920
title: "TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces"
brand: "tsi supercool"
price: "546.45 DT"
currency: TND
in_stock: true
reviews_count: 6
category: "Tsi Supercool"
url: https://www.desertcart.tn/products/296340920-tsi-supercool-28399-hvac-leak-stop-2-oz-syringe-60
store_origin: TN
region: Tunisia
---

# Permanently seals A/C & refrigeration leaks 2 oz syringe treats up to 6-ton units Protects against future corrosion TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces

**Brand:** tsi supercool
**Price:** 546.45 DT
**Availability:** ✅ In Stock

## Summary

> ❄️ Seal the deal, keep your cool – leak-free guaranteed!

## Quick Answers

- **What is this?** TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces by tsi supercool
- **How much does it cost?** 546.45 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/296340920-tsi-supercool-28399-hvac-leak-stop-2-oz-syringe-60)

## 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 guards your system’s longevity
- • **Compact & Efficient:** 2-ounce syringe treats large 6-ton units effortlessly
- • **Safe & Polymer-Free:** No polymers, ensuring zero harm to A/C components
- • **Powerful Leak Sealing:** Stop leaks permanently without system damage
- • **Universal Compatibility:** Works seamlessly with all lubricants and refrigerants

## Overview

The TSI Supercool 28399 is a 2-ounce syringe leak stop solution designed for HVAC and refrigeration systems up to 6 tons. It permanently seals leaks without polymers, ensuring no damage to system components, while its additive package protects against future corrosion. Compatible with all lubricants and refrigerants, it offers a safe, efficient, and universal fix for professional-grade HVAC maintenance.

## Description

Review: Ok - Ok
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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BH9Y9RC |
| Best Sellers Rank | #92,639 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #94 in Fillers, Adhesives & Sealants |
| Brand | TSI Supercool |
| Brand Name | TSI Supercool |
| Customer Reviews | 3.7 out of 5 stars 342 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 |
| Material Type | Plastic |
| Model Number | 28399 |
| Part Number | 28399 |
| Sterile | Sterile |
| Sterility Rating | Sterile |
| UPC | 672264028399 |

## Product Details

- **Brand:** TSI Supercool
- **Item Volume:** 2 Fluid Ounces
- **Sterility Rating:** Sterile
- **UPC:** 672264028399
- **Manufacturer:** TSI Supercool

## Images

![TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces - Image 1](https://m.media-amazon.com/images/I/81vgeD2DJ2L.jpg)
![TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces - Image 2](https://m.media-amazon.com/images/I/91dYkYTpKZL.jpg)
![TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces - Image 3](https://m.media-amazon.com/images/I/61+yBjOEAIL.jpg)
![TSI Supercool 28399 HVAC Leak Stop 2-oz. Syringe (60 mL) with Application Hose, 2. Fluid_Ounces - Image 4](https://m.media-amazon.com/images/I/31L5CfWiQML.jpg)

## 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

### ⭐⭐⭐⭐⭐ Ok
*by A***R on 17 April 2026*

Ok

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

### ⭐⭐⭐⭐⭐ Sucessful.
*by M***A on 29 November 2024*

Worked out to my car AC. All the gas leaked within a week. Refilled the gas and is successfully cooling.. one more problem faces is connector didn't work out so opened the cap of tube and directly applied

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tn/products/296340920-tsi-supercool-28399-hvac-leak-stop-2-oz-syringe-60](https://www.desertcart.tn/products/296340920-tsi-supercool-28399-hvac-leak-stop-2-oz-syringe-60)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-08*