HEAD GASKET SEALANT- Do they work? Products such as Thermagasket, Steel Seal, Blue Devil, Bars, etc? I have read a lot on the internet and it is like Bigfoot- THERE IS ALWAYS 2 SCHOOLS of THOUGHT! My 1996 Intrepid 3.5 engine will cost a bunch to have the head gasket replaced along with what else might be damaged. I just want to hear some sort of concensus. Pro Mechanics-you too check in please.

I've nver used them because they normaly wont help.i've heard that the blue devel does
& comes with a guaranty.

Personally Ive never used head gasket sealer,, I do use sealers on valve covers and other stuff on motors, But never have on a head gasket

I had a blow head gasket on my BMW 6 cyl. and it was blowing white smoke and losing alot of coolant. After doing alot of research I found that all the other brands like blue devil, steel seal, KW and bars all use water-glass. The only company that does NOT USE WATER-GLASS is Dura-Seal. If you have aluminum heads it's very important to use a sealer that can flex with your engine's aluminum heads. The DuraSeal actually stays flexible! So I tried it and it stopped the smoke and overheating. No more coolant loss either. It's been running fine for over a year now. I would reccomend Dura Seal head gasket sealer to everyone... Great product! Also the tech department guys really know what they are talking about...