Polyester Three-Side-Seal Barrier Pouch Ampac's 500 Series SealPAK is a 2ply laminated structure consisting of polyester and polyethylene (PET/PE). These boilable and freezable pouches can sustain temperatures from -56 to 115°C (-70 to 240°F). 500 Series SealPAKs are 4.5 mils…