With two of the most hair-raising rides ever set to open this summer, it only seems fitting that Six Flags Entertainment Corporation has extened its deal with Henkel’s göt2b brand, which is Six Flags’ “official hair styling product.”   This year, the göt2b brand will be integrated into the launch of the theme park company’s two major coaster openings—the record-breaking roller coaster, Goliath at Six Flags Great America in Gurnee, IL, and the world's tallest drop ride Zumanjaro, at Six Fla...