Product Review: Schwarzkopf Gliss 4 in 1 Bond-Building Hair Mask As I mentioned in my post Bleaching Hair from Dark Brown to Blonde Part 2 , I was recently successful in my mission to discover a good bond-building product at a budget price. So let's dive into why the Schwarzkopf Gliss 4 in 1 Bond-Building Hair Mask is quite possibly one of the best hair products I've come across. Disclosure: The…