Blue Devil block sealer

[fatlizzard]

Anyone ever heard of or tried this ? It's about 60.00 per bottle and claims it will permanently seal cracked heads-blocks or head gaskets!
What about the KW sealer, the permanent kind 20.00 ?

are any of these worth trying for a head gasket repair ?

[fliprayzin240sx]

NO, DONT EVER USE IT. All its good for is clogging up your radiator...there is no such thing as an easy head gasket fixer. Change the headgasket and deck the head if need be.

[awesomenick]

+1.

My friend used it to get home once, he lost compression because it got in the valves and they got stuck open. Close to his house, but still. It's all nasty in his water passages now.

Don't use it. It's pure shit.

[LA_phantom_240]

Don't use Blue Devil. It's pure ass. The only thing worth a damn is the K&W Headgasket Repair stuff... and even then I would only use it on tiny leaks where all you're getting is bubbles in the coolant, not oil in the coolant, coolant in the oil, or coolant in the combustion chamber.

[s13dan]

^^^ what they all said. I have never used it but all i hear is horror stories of the aftermath..

[s13_whoa]

Blue devil or K&W which one really works better?