How to Use a Liquid Glass Cooling System Sealer

Overheated vehicle engines need shutting down immediately, often stranding the car in an inconvenient location. Severely overheating an engine creates internal failures, requiring expensive internal repairs or engine replacement. As a result, you should ideally repair the cooling system before major damage occurs. You can often do this by replacing the leaking part. However, the cost can be prohibitive for repairs such as head gasket replacements. Cooling system sealers such as liquid glass can often temporarily stop a leak until repaired properly. Liquid glass refers to sodium silicate, which creates a glass-like coating internal to the cooling system to repair leaks.

Things You'll Need:

• Coolant drain bucket, 3 gal. capacity
• 5 gal. water
• Cooling system cleaner
• 2 buckets with lids, 5 gal. capacity
• Liquid glass cooling system sealer

1. Open the radiator cap to break the vacuum

Open the radiator cap to break the vacuum. Slide the coolant drain bucket under the front of the vehicle.

2. Drain the vehicle's coolant into the coolant drain bucket

Drain the vehicle's coolant into the coolant drain bucket by opening the radiator's drain petcock or by removing the lower radiator hose. Most vehicles have a radiator drain petcock on the lower corner of the radiator. Unscrew metal petcocks several turns. Twist plastic petcocks turn a quarter-turn counter-clockwise to unlock then pull straight out to drain.

3. Reinstall the radiator hose or close the petcock

Reinstall the radiator hose or close the petcock when the vehicle is finished draining. Empty the coolant drain bucket into one of the empty 5 gal. buckets for disposal.

4. Empty the contents of the cooling system cleaner into the radiator

Empty the contents of the cooling system cleaner into the radiator. Refill the radiator with water from the hose.

5. Turn the heater on high and start the vehicle

Turn the heater on high and start the vehicle. Run the vehicle until the temperature gauge reaches full operating temperature. Turn off the vehicle and allow the engine to cool.

6. Open the radiator cap and drain the cooling system again

Open the radiator cap and drain the cooling system again. Close the drain when the vehicle finishes draining. Empty the cooling drain bucket into the five gal. buckets.

7. Empty the contents of the liquid glass cooling system

Empty the contents of the liquid glass cooling system sealer into the radiator. Top off the radiator with cool water.

8. Start the vehicle

Start the vehicle. Turn the heater on high. Allow the vehicle to reach operating temperature. Run the vehicle for a half hour. The leak should slow to a stop during this time. Tear down and repair vehicles that continue to leak at this point. Turn off the vehicle and allow it to cool.

9. Drain the radiator

Drain the radiator. Leave the drained vehicle to sit overnight with the radiator cap removed. Empty the coolant drain bucket into the five gal. buckets.

10. Refill the radiator with the proper mix of antifreeze and water

Refill the radiator with the proper mix of antifreeze and water. Start the vehicle and run until the vehicle reaches full operating temperature. Check the antifreeze level in the radiator and overflow bottle, topping of as required.

11. Drive the vehicle

Drive the vehicle to verify the repair.

12. Seal the lids of the 5 gal. buckets

Seal the lids of the 5 gal. buckets. Dispose of used coolant at a recycling facility, auto parts store or automotive repair shop.

Tips and Warnings

Product manufacturer's directions may vary, such as only adding product directly to the antifreeze. However, perform the alternate procedure described to ensure adhesion and prevent gelling of the coolant.

Flushing the antifreeze with a cleaner removes the slick film from antifreeze chemicals inside the cooling system, improving the ability of the liquid glass to bond.

Liquid glass may react with highly acidic antifreeze to form a gel.

Cooling systems are hot. Let cool before opening. Cooling systems are pressurized. Open the radiator cap slowly to relieve pressure. Antifreeze is toxic. Dispose of properly.

Video showing how to repair head gaskets:

Helpful comments on this video:

• Update the car recently could not hold water at all again this time way worse.

We were going to replace the engine with a used one that’s why we wanted to try this out

We believe that it created a hotspot in the block and warp the head even further

So if you’re going to use this try to make it for emergency situations only

long periods of driving may damage the engine beyond repair. * In 1982, Memphis (1639 Monroe Ave, unit 301), I replaced my 1971 Pontiac Grand Prix radiator. Didn't have anti-freeze, was going to buy the next day. An unannounced cold snap hit with 5-6" snow overnight. Froze, #%%@! Blew the drain plugs right out of the block (laying on road), busted head gasket, broke thermostat housing, million leaks in the new radiator, etc. Oil mixed with water on dipstick many inches above 'full' oil line, a calf-sh!t brown froth. Hammered freeze plugs back in, junk yard thermostat housing installed, etc. Once sealed, I mixed the glass in hot water, pouring into radiator. Started car. Removed the dipstick. Watched from the house for about 40 minutes. Massive steam coming out of each tail pipe. Steam coming from dipstick stalk looked like a tea kettle. Gave up, came back a few minutes, looked in shock. No steam anywhere! Turned car off. Dipstick had oil perfect height, no more water in it. Car drove fine for years after that. I understand it's illegal for shady dealers to use, but since I was private owner, gave it a shot. Have always had a gallon of liquid glass around since, as it also seals new cement. I've no financial interest, but will say do not use it unless you have nothing to lose, lol. P.S. it wasn't sold for auto use back then in fancy cans ;)