Polyethylene Coating: A Skinny layer of polyethylene on both sides gives toughness. The outer layer protects the look and printing, even though the internal layer acts for a sealant, creating the carton wholly leakproof. Now we are able to place a WINDOW in a Gable-Prime which contains dry ingredients – https://sites.google.com/view/gabletoppak/packaging-with-gable-top-solutions