Help reduce refrigerant loss caused by aging rubber O-rings and seals with Enviro-Safe Stop Leak Aerosol. Designed for automotive R134a and R12 air conditioning systems, this formula reconditions seals that have shrunk over time and may help reduce the need for repeated refrigerant recharges.

Once installed, Stop Leak mixes with the refrigerant and oil and circulates through the system. As it contacts rubber O-rings and seals, it helps them swell, potentially reducing leaks caused by shrinkage.

Product Features

• Automotive application: For use in R134a and R12 A/C systems.

• Reconditions rubber seals: Helps address leaks caused by aging and shrinking O-rings and seals.

• One can treats one vehicle.

• Oil compatibility: Use only with mineral, ester, or PAG oils.

• R134a-style can connection: Requires a compatible hose or can tap.

• Gas propelled: Installs using the same method as refrigerant.

Stop Leak will not repair cuts or restore worn-out O-rings or seals. Damaged components require repair or replacement.

Installation & Use Restrictions

• Cannot be added to a fully charged system.

• DO NOT use in ammonia systems.

• DO NOT use in CO₂ systems.

• Follow the product label and vehicle manufacturer’s service instructions.

Compatible hoses and taps for R134a and R12 applications are available at bestrefrigerant.com.

Shipping Restrictions

Shipping to Alaska, Hawaii, or foreign countries is available only in pallet quantities.

Shop Enviro-Safe Stop Leak Aerosol and installation accessories at bestrefrigerant.com.