ThermalSeal® Sealing Films for PCR Sterile -heat resistant, recommended for temperatures from 40 °C to +120 °C -easier to apply than aluminium foils, no tendency to roll back -Certified DNase-, RNase-, and nucleic-acid-free A 50 µm heat-resistant polypropylene sealing film with a 25 µm layer of acrylic adhesive designed for thermal cycling applications. (Not recommended for PCR plates with narrow or irregular sealing surfaces: ThermalSeal 2™, AlumaSeal®, ThermalSeal A™, or ThermalSeal RT™ series films are better in such instances.) Each sealing film measures 79.4 x 135.1 mm and offers sufficient sealing area for all PCR plates. Length between the perforations with end tabs removed is 123.1 mm. ThermalSeal sealing films are not pierceable. For applications where piercing with pipet tips or robotic probes is required for product recovery, see AlumaSeal® sealing films. For real-time PCR applications where maximum optical clarity is required, see ThermalSeal RT and RT2RR sealing films.