We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small green 2 oz bottle of Supercool ST22 A/C leak stop liquid

Supercool

Supercool ST22 A/C Leak Stop Metal 2 oz

SKU CH-WW3G-DSN8D

A 2 oz leak-stop additive with UV dye seals A/C leaks and works safely in R-134a and R-1234yf systems, including electric and hybrid vehicles

  • Stops A/C leaks permanently with metal-infused formula
  • UV dye pinpoints leak location for faster repairs
  • Safe for EV and hybrid A/C systems
  • Works with R-1234yf and R-134a refrigerants
  • Withstands extreme temps up to 570 Degrees F

Leak Stop for R-134a and R-1234yf Systems

This 2 oz bottle of Supercool ST22 seals leaks in automotive air-conditioning circuits while adding UV dye for detection. It is formulated for use with R-134a and R-1234yf refrigerants. The liquid treatment is safe for electric and hybrid vehicles and will not harm or clog system components or service equipment.

Check Refrigerant Type and Charge Port Access

Before ordering, confirm the vehicle uses R-134a or R-1234yf refrigerant and that the low-side service port is accessible. The product is not compatible with other refrigerant types. Ensure the system still holds enough pressure to circulate the liquid through the circuit.

Thermal Limits and Non-Flammable Formula

The fluid has a flash point of 425 Degrees F and a boiling point of 570 Degrees F, indicating stability under normal engine-bay temperatures. Specific gravity ranges from .85 to .089. The formula contains no ingredients that create flammability hazards during typical A/C operation.

Highlights

  • Stops A/C leaks permanently with metal-infused formula
  • UV dye pinpoints leak location for faster repairs
  • Safe for EV and hybrid A/C systems
  • Works with R-1234yf and R-134a refrigerants
  • Withstands extreme temps up to 570 Degrees F

Specifications

BrandSUPERCOOL

Questions about this item

Does the 2 oz bottle include the injection hose or must I buy it separately?

The package contains only the 2 oz leak-stop liquid with UV dye; an injection hose or can tap is not included and must be purchased separately.

Should I choose the R-134a or R-1234yf version for my vehicle?

This single formula works with both R-134a and R-1234yf refrigerants, so no separate version selection is required.

What does the 570 °F boiling point mean once the product is circulating in the A/C system?

The 570 °F boiling point shows the fluid remains stable well above normal operating temperatures, so it will not vaporise or lose sealing ability under typical system pressures.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.