Is there any risk in using "too much"? I only have a 3 ton system. Any risk in using all of it?

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.

Does this work with 410A systems?

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.

Can it be used on automotive r134a a/c systems?

No, it is for stationary HVAC-R systems.

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TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)

TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)

Product ID: 69107216

Details

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

💧Treats up to 6-ton HVAC units

♻️Biodegradable & corrosion protection

🛠️Seals leaks ≤30mm permanently

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€ 83.68

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Details

Brand
TSI Supercool
Item Volume
2 Fluid Ounces
Material
Plastic

Description

❄️ Stop leaks, save your system, and chill with confidence!

PRO LEVEL CAPACITY - 2 fl. oz. syringe treats up to 6-ton units—perfect for professional-grade repairs.
ECO CONSCIOUS CHOICE - Biodegradable formula aligns with sustainable, responsible maintenance practices.
LEAK PROOF CONFIDENCE - Permanently seals leaks up to 30mm without polymers—safe for all A/C systems.
EXTENDED HVAC LIFESPAN - Additive package fights future corrosion and reduces compressor noise for longer life.
UNIVERSAL COMPATIBILITY - Works seamlessly with all lubricants and refrigerants—no system left behind.

The TSI Supercool 28399 HVAC Leak Stop Syringe is a 2 fl. oz. professional-grade solution designed to permanently seal leaks up to 30mm in A/C and refrigeration systems. Compatible with all lubricants and refrigerants, it treats units up to 6 tons while protecting against future corrosion with a biodegradable additive package. Ideal for managers and pros seeking reliable, eco-friendly HVAC maintenance that extends system life and reduces noise.

Specifications

ASIN	B07BH9Y9RC
Best Sellers Rank	#84,141 in Automotive ( See Top 100 in Automotive ) #279 in Air Conditioning Line Repair Tools
Brand	TSI Supercool
Brand Name	TSI Supercool
Customer Reviews	3.8 out of 5 stars 352 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
Model Number	28399
Part Number	28399
Sterile	Sterile
Sterility Rating	Sterile
UPC	672264028399
Unit Count	2.0 Fluid Ounces
Warranty Description	manufacturer warranty

Reviews

K**D

1.05.2023

S**S

30.06.2022

J**.

13.03.2025

A**R

15.07.2023

A**.

26.08.2023

A**R

13.11.2024

R**N

25.07.2022

F**N

1.06.2022

M**A

29.11.2024

H**I

28.07.2023

A**R

17.04.2026

V**.

24.02.2026

B**I

28.06.2025

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€ 83.68

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In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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