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10 bestRefrigerant Leak Sealerof September 2025

112M consumers helped this year.

57% off

1

FrostyCool R134a and R12 Replacement A/C Refrigerant Deluxe Recharge Mobile Sealer and Stop Leak Kit
FrostyCool R134a and R12 Replacement A/C Refrigerant Deluxe Recharge Mobile Sealer and Stop Leak Kit

FrostyCool

9.9

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20% off

2

emzone Multi 12A A/C Deluxe Recharge & Sealant Kit
emzone Multi 12A A/C Deluxe Recharge & Sealant Kit

Emzone

9.8

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3

Ultra Cool 1234yf Refrigerant kit w/Stop Leak
Ultra Cool 1234yf Refrigerant kit w/Stop Leak

Ultra Cool

9.6

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4

LEAK SAVER Direct Inject Refrigerant Leak Sealer – Small System AC Refrigerant Leak Sealant for Most HVAC Systems - Automotive Leak Sealer – Up to 1 Tons (Small)
LEAK SAVER Direct Inject Refrigerant Leak Sealer – Small System AC Refrigerant Leak Sealant for Most HVAC Systems - Automotive Leak Sealer – Up to 1 Tons (Small)

Leak Saver

9.4

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6% off

5

emzone Multi 12A A/C Stop Leak (45856)
emzone Multi 12A A/C Stop Leak (45856)

Emzone

9.2

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Nu Calgon 4050-08 EasySeal Direct Inject

Nu Calgon 4050-08 EasySeal Direct Inject

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Rectorseal 45312 AC Leak Freeze 1.5oz Cartridge, 1.5 oz

Rectorseal 45312 AC Leak Freeze 1.5oz Cartridge, 1.5 oz

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6

Leak Saver: Direct Inject - for Air Conditioner, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants - Proudly Made in The USA
Leak Saver: Direct Inject - for Air Conditioner, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants - Proudly Made in The USA

Leak Saver

9.0

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7

Rectorseal 45317 AC Freeze PRO Nano Magic Frost Leak Sealer, 1.5 oz, Green
Rectorseal 45317 AC Freeze PRO Nano Magic Frost Leak Sealer, 1.5 oz, Green

Rectorseal

8.8

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8

12a Refrigerant with leak detecting dye 6oz 4 pack
12a Refrigerant with leak detecting dye 6oz 4 pack

Ultra Cool

8.5

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9

Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, Treats 1.5-5 Tons
Nu-Calgon 4050-11 EasySeal Direct Inject-UV Dye Refrigerant Leak Sealant, Treats 1.5-5 Tons

NU-Calgon

8.2

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10

Red Angel A/C Stop Leak - 2 Ounce (49496)
Red Angel A/C Stop Leak - 2 Ounce (49496)

BlueDevil Products

7.9

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