A 36 µm soft non-permeable aluminum foil sealing film with strong medical-grade adhesive, AlumaSeal II sealing films eliminate the need for heat-sealing devices or mats during thermal cycling. Each sealing film measures 82.6 x 142 mm and offers sufficient sealing area for all PCR plates. Length between the perforations with end tabs removed is 125.4 mm. Compared to other aluminum foils, AlumaSeal II has less tendency to roll back or itself when removing the backing paper and conforms well to the plate during application. Sterile product is packaged in bags of 50.