Automotive A/C system support product. Refer to packaging and images for exact contents and configuration. 🚗 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.