R134a Replacement w/Stop Leak in 21oz Equivalent Cans
Cobalt Refrigerants

R134a Replacement w/Stop Leak in 21oz Equivalent Cans

$30.00

Manufactured by Enviro-Safe Refrigerants, Inc.

❄ No EPA 609 Cert Required✓ Made in USA Since 1996🛡 Ships Same Day
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Contact: (309)620-3440 / cobaltrefrigerants@gmail.com
What's your return policy?
Due to federal hazmat shipping regulations, pressurized refrigerant cylinders are non-returnable once shipped. Please verify your system compatibility and charge requirements before ordering. If your cylinder arrives damaged, contact us within 48 hours with photos and we'll file a carrier claim and ship a replacement.
Product Details

Enviro-Safe® R134a Replacement with Stop Leak (21 oz. Equivalent Can)

✅ Seals Leaks & Restores Cold Air
Recharge your A/C system while sealing small leaks from O-rings and rubber components. Enviro-Safe® R134a Replacement with Stop Leak has been trusted for over 29 years to bring back that original, icy-cold performance.

Key Benefits

  • 1 Can = 21+ oz. of R134a – cools with less product required

  • Stop Leak Formula – seals leaks in O-rings and gaskets

  • Lower Head Pressure – extends compressor life and improves efficiency

  • Compatible with most refrigerant oils and R134a systems (including pre-1994 vehicles that meet EPA Snap regulations)

  • Non-ozone depleting & non-global warming

  • Made in the USA with pharmaceutical-grade, computer-blended hydrocarbons

  • No foul odor – unlike other brands, Enviro-Safe is highly refined and sulfur-free

Why Enviro-Safe?

Other brands cut corners with unrefined hydrocarbons that create a strong sulfur or “rotten egg” smell. Enviro-Safe is different:

  • Pharmaceutical-grade & highly refined

  • Blended to within 0.25% accuracy by a major U.S. petrochemical supplier

  • Consistent quality every time you use it

  • Backed by a guarantee not to harm compressors or mechanical components when used as directed

Enviro-Safe refrigerants meet international standards including ISO 5149, BS 4434-1995, AS/NZS 1677, and ASHRAE 5149.

Important Notes ⚠️

  • Do NOT use in ammonia systems

  • Do NOT pull a vacuum when charging with this product (cans are not designed for vacuum use)

  • For larger or dual A/C systems (SUVs, vans, Suburbans), use Enviro-Safe Industrial R134a Replacement instead

  • Flammable – keep away from sparks, open flame, or smoking materials

  • Cannot ship to Alaska, Hawaii, or overseas (except pallet quantities)

Directions (Summary)

  1. Repair all leaks before charging.

  2. Recover existing refrigerant.

  3. With compressor OFF, connect gauges/hoses.

  4. Invert can and charge into the low-pressure side.

  5. Test for leaks with dye, UV glasses, electronic tester, or soap bubbles.

  6. Turn compressor ON, add refrigerant until pressures match manufacturer specs.

  7. Do NOT exceed 60 psi on the low-pressure port.

  8. Disconnect gauges and cap service ports.

(Full instructions printed on the can — follow manufacturer guidelines closely.)


R134a Replacement w/Stop Leak in 21oz Equivalent Cans