Dura-Seal, PermaTech, ABX International, These guys are liars and scammers. They make fake websites full of Fake Testimonies! Fake Site: http://www.automotiveforumz.com/ Real Site: http://www.automotiveforums.com They also have a fake review site that they own on their website: http://www.head-gasket-repair.com/xpert-answers/head-gasket-sealer-comparison/ They make all kinds of bull claims. we purchased the product for a BMW when it did not work they wouldn't warranty it because we purchased the specially blended kit! My father in law is a concrete contractor who uses sodium silicate to seal concrete. This product is 100% watered down Sodium Silicate. They are about as dishonest as they come! Georgia Internet