Prestone Triple Seal Protection Head Gasket Stop Leak 488ml AS663Y

Features & Benefits

Prestone ® Triple Seal Protection™ Head Gasket Stop Leak, Engine Block Stop Leak, and Radiator Stop Leak with Kevlar ® resin stop leaks fast, seals them permanently and won’t harm your cooling system.

Triple Seal Protection™ is an advanced formulation that speeds leak seeking chemicals through your system to help keep your cooling system working and your car running.

Instructions

Head Gasket Stop Leak:

Do not add to overflow tank. Add to radiator or pressurized surge tank. Ensure engine is off and cool to the touch.

1. Pre-dilute beads in warm water, open cooling system and add pre-diluted liquid mixture to cooling system.
2. Start vehicle with heater set to high. SLOWLY add entire bottle to cooling system taking at least a full minute to pour both liquids. Top off with 50% Prestone ®Antifreeze.
3. Immediately replace the cooling system cap and idle vehicle for 1 hour after reaching normal operating temperature. Turn off the engine.
4. Allow vehicle to sit overnight. Check cooling system before using and and top off with 50% Prestone ® Antifreeze if needed.
5. After 1 week drain the cooling system and refill with 50% Prestone ® Antifreeze.

Meets ASTM D3147 and D6107 stop leak specifications.
DO NOT REUSE BOTTLE

CAUTION: Never open a hot cooling system.
NOTE: Dirty, oily, or clogged systems should be flushed with Prestone® Flush + Cleaner and refilled before use.
NOTE: Use only one treatment, compatible with all colors of antifreeze/coolant.

Technology

The Power of Triple Seal Protection™:

• Effervescent beads quickly break down and go to the source of the leak.
• DuPont™ Kevlar ® resin forms a fibrous web that binds to metals.
• An acrylic polymer hardens and secures the seal and makes it permanent.

About Prestone

Headquartered in Chicago, IL, Prestone is the number one branded consumer choice for antifreeze/coolant, brake fluid, and power steering fluid in North America. Prestone manufactures and markets antifreeze/coolant, brake and power steering fluid, windshield washer fluid and other leading vehicle maintenance products. Prestone antifreeze/coolant has protected vehicle cooling systems since 1927.