SEALING LEVEL
The level of air & water tightness not only depend on the zipper type (MasterSeal, SuperSeal, WaterSeal, RingSeal) and but also on the zipper configuration.
When it comes to extreme requirements with heavy professional use, the MasterSeal #10 with polymer slider is the world’s first 1,0 bar (14 PSI) water & airtight polymer zipper.