10 Best R1234yf Dye And Stop Leak of 2025

Tested and Reviewed: Top 10 R1234yf Dye And Stop Leak deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Generic

Stop Leak for R1234yf Systems, R-1234yf Stop Leak

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Editor's bottom line:

“This r1234yf dye and stop leak is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

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Stop Leak

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Picked by 397 people today

9.5

A/C Pro

A/C Pro Certified A/C Pro Car Air Conditioner Leak Detector Dye, Leak Detection UV Dye Detects Leaks in R-1234YF AC Systems, 1 Oz

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1 oz. of leak detection dye
Used to identify leaks in R-1234yf A/C systems
UV dye glows when under ultra-violet light for easy to identify leaks (UV flashlight sold separately)
Compatible with lubricants that are commonly used in cars with R-1234yf A/C systems
Meets SAE requirements

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9.5

TSI Supercool

TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems)

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Total Leak Stop for HFO-1234yf AC Refrigerant systems. Stops small leaks in METAL & RUBBER A/C components including evaporators, condenser, hoses, gaskets & O-rings. (NOT FOR USE IN R134a SYSTEMS)
IMPORTANT: Confirm your vehicle uses HFO-1234yf Refrigerant. HFO-1234yf low side service port adapter is larger in diameter than an R134a low side service port. The quick connect hose coupler should fit snugly. If it does not fit snugly it indicates the system is not an HFO-1234yf Refrigerant System
Each can is overfilled to ensure proper amount of fluid is injected into AC System and allows for residual fluid remaining in hose after application
Scan QR code on product box for short video on proper installation
1 can treats 1 vehicle

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9.2

ENVIRO-SAFE

ENVIRO-SAFE UV Dye Charge – Leak Detector for R1234YF, R134a, R12, R22, R600a, R290 & More | Fluorescent AC Leak Detection Dye - Single Can (Can Only)

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Works in All AC Systems Compatible with R1234YF, R-134a, R-12, R-22, R-600a, R-290 and more Safe for all oils (PAG, POE, Mineral).
Instant Leak Detection Bright UV fluorescent dye circulates with refrigerant and glows under UV light, making leaks easy to see.
Easy Install Just Like Adding Refrigerant Connect to your low-side port, invert can and dispense. No special tools required.
Choose Your Kit Available with R134a hose, R1234YF hose, 1/4" flare hose, or #5010 top tap for gauges & custom setups.
Save Time & Refrigerant Pinpoint leaks, fix only whats leaking, and stop wasting money on constant recharge cycles.

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9.0

Leak Saver

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

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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. Its 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.

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8.8

ERRECOM

Errecom Extreme Ultra | A/C Leak Stop for Vehicle A/C Systems | Works with All Refrigerants and Lubricants | Includes R1234yf and R134a Adapters | 0.2 fl oz (6 mL) Cartridge

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SEALS REFRIGERANT LEAKS: successfully stops small refrigerant leaks in A/C and refrigeration systems. Perform a 5-minute vacuum test to ensure the leak can be repaired with Extreme Ultra
THE SAFEST CHOICE POLYMER-FREE FORMULA: does not react with moisture or oxygen, ensuring maximum system protection and preventing blockages or damage to HVAC/R components, including expansion valves (TXVs, TEVs, capillary tubes) and Schrader valves
REUSABLE & REFILLABLE SYSTEM US PATENTED (US 11002470): it can be reused with every new application. Just purchase the Extreme Ultra cartridge alone next time and save money on your refill!
OEM-APPROVED FORMULA: developed by Errecoms in-house chemical laboratory, trusted by HVAC technicians and OEMs since 2001 in over 130 countries
Ideal for PREVENTATIVE MAINTENANCE: AVOIDS LEAKS before they develop
100% Made in Italy formulation and production

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8.6

FJC

FJC FJC6810 1 Pack UV A/C Dye (R-1234Yf)

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Contains 1 oz.
Use 1/4 oz. per 12 oz. oil
FJCs Air Conditioning Dyes mix with the oil and refrigerant and circulate throughout the A/C system
At the area of a leak, a small amount of dye will escape and stain the area with dye, exposing the leak.
UV/Fluorescent dyes allow the operator to see this with the aid of the UV lamp and enhancing glasses
Manufactured in the United States

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8.3

TSI Supercool

TSI Supercool 39241B Total Leak Stop and U/V Dye, 1 oz (HFC Free BOV Can with Adapter, Retail Box)

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Engineered To Stop Small Leaks in Evaporators, Condensers, Hoses, Gaskets, and Seals
Features a Formula that Does Not Contain Polymers so it Will Not Harm or Clog AC System Components, Reclamation Or Recovery Machines
Offers a Simple 1-Can Treats 1-Vehicle Option
Features Patented Technology HFC-FREE Aerosol US Patent No. 8,047,009. Foreign Patents Pending
Engineered to Supercool' s Highest Standards

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8.1

ENVIRO-SAFE

ENVIRO-SAFE R1234YF Auto AC Recharge Kit with Arctic Air, Oil Charge, Stop Leak, Gauge, 4-Piece Professional System

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COMPLETE KIT: Professional 4-piece R1234YF AC recharge kit includes 2 cans of Arctic Air, 1 can of oil charge, 1 can of stop leak, and 1 gauge for comprehensive system maintenance
ARCTIC AIR PERFORMANCE: Dual-action formula removes moisture to prevent system corrosion while reducing friction for improved cooling performance and colder air duct temperatures
OIL CHARGE FUNCTION: Specialized oil blend restores proper lubrication levels in systems that have lost oil charge due to leaks or malfunctions, compatible with mineral, ester, and PAG oils
STOP LEAK TREATMENT: Reconditions and swells rubber O-rings and seals to help prevent refrigerant loss, with one can treating a complete vehicle system
INSTALLATION REQUIREMENTS: Requires proper R1234YF compatible hose or gauge for installation which comes with this kit, cannot be added to fully charged systems, and installs similarly to standard refrigerant

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8.1