Best Freon Leak Sealant 2023 - Top 10 Picks

This is the ultimate buyer's guide to finding the right freon leak sealant to suit your needs. We review the 10 best freon leak sealant on the market so you know that your next decision will be a smart one!

When you're trying to select the good freon leak sealant, there are a lot of factors to consider. This page has everything you need to know in one place.

This guide will help you avoid the pitfalls that come with researching freon leak sealant.

You don't have to try out every freon leak sealant to find one that meets your needs. After extensive research and hours of in-person tests, we've found the best freon leak sealant to be Leak Saver Direct Inject UV - Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks - for AC, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants. There are a lot of sub-par products out there, but this product is one of the highest quality you'll find. Next best option is Leak Saver Direct Inject Ultimate 3-in-1 Leak Sealant with Moisture Remover and UV Dye for AC, Refrigeration, and Automotive Systems up to 5 Tons - Compatible With All Refrigerants - Made in USA - 6ct.

Choosing the freon leak sealant can be a daunting task, especially if you're doing it for the first time. Here's what we recommend based on our extensive research. We've compiled a list of the highest rated freon leak sealant. The following products are some of the best you can get right now.

List of Top 10 Freon Leak Sealant

Review of Best Freon Leak Sealant

1. Leak Saver Direct Inject UV - Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks - for AC, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants

  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans. The Leak Saver 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.
  • MORE THAN 3 MILLION UNITS SOLD SINCE 2015: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours. It’s similar to how blood in your body reacts to a cut. 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.
  • WITH ADDED UV DYE FOR FINDING LARGE LEAKS: Seal it or find it! If you have a leak that is simply too large for leak sealants to seal, the added UV Dye will light up brightly at the leak site when using a UV flashlight.
  • COMPATIBLE WITH ALL SYSTEMS AND REFRIGERANTS: : The Leak Saver UV is compatible with all systems, refrigerants (except ammonia), and oils. It is great for central air conditioners, car and 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.
  • YOUR SATISFACTION IS OUR PRIORITY: We stand behind the effectiveness 100%. If for any reason you are not satisfied with your product, please contact us and we will make it right.

2. Leak Saver Direct Inject Ultimate 3-in-1 Leak Sealant with Moisture Remover and UV Dye for AC, Refrigeration, and Automotive Systems up to 5 Tons - Compatible With All Refrigerants - Made in USA - 6ct

  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans. The Leak Saver 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.
  • 6 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!
  • OVER THREE MILLION UNITS SOLD SINCE 2015: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours. It works similarly to how blood in your body reacts to a cut. 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 AND REFRIGERANTS : The Leak Saver Ultimate is compatible with all systems, refrigerants (except ammonia), and oils. It is great for central air conditioners, car and 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.
  • YOUR SATISFACTION IS OUR PRIORITY: We stand behind the effectiveness 100%. If for any reason you are not satisfied with your product, please contact us and we will make it right.

3. Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, One Size Treats Systems 2 to 7.5 Tons

  • 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

4. ENVIRO-SAFE Direct Inject ProSeal XL4 1.5-5 ton Inject Stop Leak R-22 Home Contractor 3 Pack #2100AI-5CP

  • Concentrated
  • No Pump Down
  • For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils
  • 1.5-5 Ton
  • Compatible with all refrigerants, except ammonia

5. Leak Saver Direct Inject Refrigerant Leak Sealer - 2022 Updated Sealant Formula for Most HVAC Systems Up to 5 Tons - Made in The USA

  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans. The Leak Saver 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.
  • A PERMANENT FIX FOR LEAKS: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours. It’s similar to how blood in your body reacts to a cut. 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.
  • OVER THREE MILLION UNITS SOLD: With over 3 million units sold of this sealant formula since 2015, we are the most reliable leak sealant among HVAC professionals. Super concentrated and made to work with all types of refrigerants, it’s compatible with all types of refrigerants and oils (except ammonia).
  • MADE BY HVAC PROFESSIONALS: And used by them, it’s perfect for use in Split Systems, Heat Pumps, Commercial Unit Coolers, Refrigeration Systems, and more.
  • YOUR SATISFACTION IS OUR PRIORITY: We’re so sure this will seal your next leak that if it doesn’t, contact us for another at no cost (must be installed by certified HVAC techs).

6. InterDynamics Car Air Conditioner, Certified A/C Pro Refrigerant Leak Stop Kit for R134A Car Air Conditioners, 3 Oz Each

  • Seals metal leaks in condensers, evaporators, accumulators, receiver and driers
  • Seals rubber leaks in hoses O-rings and gaskets
  • Comes with recharge hose
  • Safe for all R-134a systems
  • Professional grade

7. Elitech HVAC Refrigerant Leak Detector 10 Yrs Infrared Sensor Life Halogen Freon Sniffer, Air Conditioning Detection, Automotive Gas Finder, R22 R410A R134A R1234YF CFCs HCFCs HFCs, ILD-200

  • Infrared Leak Detector: Compared with the heated diode leak detector, the infrared refrigerant leak detector has strong anti-interference ability, faster response speed, more accurate and longer service life.
  • Higher Sensitivity: Adjustable sensitivity with High/Medium/Low levels and the maximum sensitivity is up to 0.14oz/yr. Meet SAE-2791 & SAE-2913 standards for automotive AC leakage detection as well as the refrigeration industry.
  • Detecting All Halogenated Gases: It can detect all kinds of halogen refrigerants including CFCs, HFCs, HCFCs, HCs, HFOs and mixed refrigerants such as R11/R22/R404a/R410a/R600a/R1234yf and Blends such as AZ-50, HP62, MP39 etc.
  • 2.8' Large Screen: Do not missing any leakage. The peak display clearly indicates the orientation of the leak detection point and provides users with a quiet working environment.
  • US Local Team R&D and Service: We offer 24/7 customer service and technical support.

8. Red Angel 00222 A/C Stop Leak & Conditioner - 4.5 Ounce

  • Guaranteed Permanent Seal
  • Will Not Clog or Damage the A/C System or Recovery Unit
  • GUARANTEED PERMANENT SEAL
  • Now with UV Dye for leak detection

9. Refrigerant Leak Detector, Aprvtio ALD-200 Freon Leak Detector, Freon Sniffer Automotive Halogen Gas Leak Detector for R134A R410A R22 R1234YF R600a R290 CFCs HCFCs HFCs HCs HFOs

  • 【High Sensitivity and Adjustable】3 modes of sensitivity with maximum sensitivity up to 0.14oz./yr. You can increase or decrease the sensitivity to find the leak in different situations. 16 inch sensor probes that allows you to reach hard-to-reach areas.
  • 【Audible & Visual Alarm with Mute Function】When the leakage is detected, the refrigerant leak detector screen will show the leakage level, and more rapidly it beeps. Press the MUTE button to turn on/off the buzzer.
  • 【User-friendly Design】 Reset Function of the freon leak detector allows you to identify leaks without the false positives of the background concentration. Peak function records the max. value of leaks. The built-in 3000mAh rechargeable battery of the freon tester is more environmentally friendly and provides continuous 6 hours working time.
  • 【Detecting All Halogenated Gases】[CFCs: R12, R11, R500, R503 etc.] [HCFCs: R22, R123, R124, R502 etc.] [HFCs: R134a, R404a, R125, R438a etc.] [HFOs: R1234 etc.] [HCs(Hydrocarbon): R290, R600a etc.] [ Blends: AZ-50, HP62, MP39, R410a etc.]
  • 【Worries Free Gas Detector 】We offer one-year warranty for the Halogen leak detector. If you have any questions, please contact us and see more product information on the details page.

10. Elitech Refrigerant Leak Detector, Infrared & Heated Diode Sensors in 1 Unit, HVAC Halogen Gas Sniffer, Anti-interference, Reach SAE Standards, IR-200

  • Buy One, Get Two Sensors: Elitech IR-200 comes with both the infrared sensor and the heated dioded sensor. Quick switch between two sensors, ensures high accuracy and maximum of 10 years sensor life. It triggers all halogenated refrigerants much more precisely than the traditional corona sensor and single heat-diode sensor.
  • Higher Sensitivity: Adjustable sensitivity with High/Medium/Low levels and the maximum sensitivity is up to 0.14oz/yr. Meet SAE-2791 & SAE-2913 standards for automotive AC leakage detection as well as the refrigeration industry.
  • Detecting All Halogenated Gases: It can detect all kinds of halogen refrigerants including CFCs, HFCs, HCFCs, HCs, HFOs and mixed refrigerants such as R11/R22/R404a/R410a/R600a/R1234yf and Blends such as AZ-50, HP62, MP39 etc.
  • 2.8' Large Screen: The peak display clearly indicates the orientation of the leak detection point and provides users with a 'quiet' working environment. Never missing any leakage.
  • US Local Team R&D and Service: We offer 24/7 customer service and technical support.

Last update on 2023-12-03 / Affiliate links / Images from Amazon Product Advertising API

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