Super Seal, 11.4 oz., Permanently Seals Cracks & Holes, Copper Infused Liquid Glass Sealer, Withstands Extreme Conditions, Ideal for Engine Blocks, Radiators, Head Gaskets, & Freeze Plugs (1)

I bought this as a last ditch get-out-of-trouble hail marry in case it was needed for a fly in then drive an unknown and untested vehicle home adventure. I knew the vehicle in question had a coolant leak at the front of the engine and went prepared with a new water pump, hoses, thermostat, etc... After changing everything all looked well until about an hour into the drive the temp gauge started climbing. After a quick under hood check i noticed a coolant leak off of the front right corner of the engine that i couldn't locate due to the engine accessories being in the way. This is where this product was put into use - after popping the radiator cap and noticing the radiator was now about 1/2 empty I poured this in and topped off the system with an extra gallon of water i had then crossed my fingers and hit the road. All I can say is this stuff did its job and stopped up the leak so i could complete my trip of over 700 miles home without loosing any additional coolant. I did tear into the engine once home and found the source of the leak - a rotted out freeze plug with a pinhole on the front of the passenger side cylinder head. This product coagulated a "plug" at the hole and stopped up the leak saving the engine from overheating and incurring any additional damage. In my opinion this is a great product for a small leak that needs temporary fix or to keep that older vehicle on the road until proper repairs can be made.

It doesn't hold and sealed it for about 20 minutes it's a small water leak you should have worked largely did he's been around forever and this stuff supposed to fix it permanently and be forever it don't do nothing and who does the blue angel stuff either

Worked great

Recommended purchase!

I didn’t open it because I was looking for something to seal my free plugs. This looks like good liquid w copper but not what I was looking for

Did not work. I use three bottles. I used just like directed, I will not buy again

works great

was a waste of money