Has anyone heard of or ever used a product called thermagasket? 
http://www.rxauto.com/   It's made by Rx Auto  It's proclaims to fix a failed head gasket.  I have a '99 ford windstar with 128K miles with a bad head gasket.  I tried the BARs product which did not work.  The cost of the repair is not worth the value of the car.  The thermagasket product is approx $100.00 plus S&H.  They say you get a full refund if it does nor work, but I don't know how you prove that to a company in CA.  
Any thoughts?
Thanks
Carl