With two of the most hair-raising rides ever set to open this summer, it only seems fitting that Six Flags Entertainment Corporation has extended its deal with Henkel’s göt2b brand, which is Six Flags’ “official hair styling product.”   This year, göt2b 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 Flags Great A...