Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer
Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer

Enviro-Safe StopLeak for R1234YF Systems – 12 Cans × 4 oz – A/C Seal Conditioner & Leak Preventer

FrostGuard Solutions
5.0 (24 reviews)
$118.99

🚗 Stop Leaks. Restore Cooling. Protect Your A/C System.
Over time, the rubber o-rings and seals in your A/C system dry out, shrink, and begin to leak refrigerant. ❄️ Enviro-Safe® StopLeak for R1234YF Systems is specially formulated to recondition those worn seals, helping you keep your cabin cool and your system sealed tight.

🧴 How It Works:
When added to your A/C, StopLeak mixes directly with the refrigerant and oil, circulating throughout the system. As it moves, it softens and swells rubber seals and o-rings, closing small gaps that let refrigerant escape. The result? Stronger seals, better pressure, and colder air.

⚙️ Key Features:

✅ Reconditions Seals & O-Rings – Restores flexibility to rubber parts and helps prevent refrigerant loss.
🔧 Easy DIY Install – Works like adding refrigerant: connect, invert, and charge in minutes.
💨 For R1234YF Systems – Safe for all automotive systems using R1234YF refrigerant and PAG, Ester, or Mineral oils.
🔩 134a-Style Thread – Features a standard R134a top fitting; a normal R1234YF gauge or hose will not fit without an adapter.
💪 Prevents Future Leaks – Helps maintain system pressure and may eliminate the need for yearly recharges.
🇺🇸 Made in the USA – High-quality, gas-propelled aerosol you can trust.
⚠️ Important Safety Notes: Use only in R1234YF automotive A/C systems. Do not use in ammonia or CO₂ systems. Cannot ship to Alaska or Hawaii (except pallet quantities).

🔧 Directions for Use:

1️⃣ Make sure the A/C system is off before connecting.
2️⃣ Shake can well.
3️⃣ Attach a can tap valve and charging hose.
4️⃣ Connect to the low-pressure side ONLY.
5️⃣ Start vehicle and turn A/C on high.
6️⃣ Invert can and install contents completely.
7️⃣ Recharge with refrigerant to manufacturer specs (do not overcharge).
8️⃣ Run A/C to circulate StopLeak.
9️⃣ Dispose of empty can properly per local regulations.

💡 Pro Tip: Pair StopLeak with Enviro-Safe ProSeal or Arctic Air Boosters for the ultimate in cooling performance and leak protection.