Prestone Triple Seal Protection Engine Block Stop Leak 488ml AS661Y

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

Engine Block 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. Pour entire contents of both liquids into the cooling system.
3. Top off with 50% Prestone ® Antifreeze and close cooling system.
4. Run engine at idle with heater set to high for 20 minutes after reaching normal operating temperature and shut off the engine.
5. After cooling, check the coolant level frequently and top off with 50% Prestone ®Antifreeze as needed.

Meets ASTM D3147, D6107, D1384, D4340 and D1881 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.