StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive
StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive

StopLeak for R12 Systems – 10 × 4 oz Cans – Reconditions O-Rings & Seals | Enviro-Safe Automotive A/C Additive

FrostGuard Solutions
5.0 (24 reviews)
$76.99

Restore Your R12 A/C System – Seal Leaks the Smart Way

Over time, rubber O-rings and seals inside your vehicle’s air conditioning system shrink, harden, or deteriorate. The result? Refrigerant slowly leaks out, leaving you recharging your A/C year after year.

That’s where Enviro-Safe StopLeak for R12 Systems comes in. This professional-grade additive is designed to recondition and revitalize O-rings and seals by causing them to swell back to their proper size. The result is a tighter seal and fewer refrigerant losses — helping you save money, protect your system, and extend its service life.

✅ Key Benefits

  • Compatible with R12 & R134a systems – Works in classic vehicles, older A/C systems, and retrofitted models.

  • Reconditions seals & O-rings – Swells and rejuvenates rubber components to stop small leaks.

  • Simple installation – Installs just like refrigerant using a can tap and charging hose.

  • One can treats one vehicle – No need for multiple cans per application.

  • Save money long-term – May eliminate the need for yearly recharges caused by slow refrigerant loss.

⚙️ How It Works

  • StopLeak is a gas-propelled aerosol that mixes with your system’s refrigerant and oil.

  • As it circulates, the formula comes in contact with worn O-rings and seals.

  • These components swell back to size, reducing leaks and restoring system efficiency.

  • Works with Mineral, Ester, and PAG oils commonly found in automotive A/C systems.

📦 Product Details

  • Size: 4 oz aerosol can

  • Top: R134a style top (hoses and taps available in both R134a & R12 for installation)

  • System Compatibility: R12 and R134a

  • One can = one vehicle treatment

  • Gas propelled; installs the same way as refrigerant

⚠️ Important Notes

  • Does not fix cuts or severely worn seals – For reconditioning only.

  • Do not use in ammonia or CO₂ systems.

  • Cannot be added to a fully charged system.

  • Not for use in Alaska, Hawaii, or export (except pallet quantities).

📖 Directions for Use

  1. Shake can well.

  2. Install can tap valve and charging hose.

  3. Connect to the low-pressure side only.

  4. Start the A/C.

  5. Invert can and install entire contents.

  6. Fill system to manufacturer’s specification pressure – do not overcharge.

  7. Run A/C to circulate product.

  8. Dispose of empty can responsibly.

Bring new life to your R12 system and keep your A/C colder, longer — with Enviro-Safe StopLeak.