A soft aluminum foil film designed for the sealing of PCR plates minimizing evaporation and vapor loss during thermal cycling. The film pierces very easily for direct sample recovery with a multichannel pipettor or robotic metal probes without risk of aerosols, cross-contamination or significant gumming of adhesive. An extremely strong, medical-grade adhesive provides a uniform, complete seal which can withstand PCR thermal cycling. Recommended for temperatures from -80 °C to 120 °C, measures 82.6 mm x 146.1 mm and offers sufficient sealing area for all PCR plates. A 36 μm non-permeable soft aluminum foil film eliminates the need for heat-sealing devices or mats during thermal cycling. The proprietary adhesive can withstand harsh chemicals, solvents and reagents. Two end tabs for easy and accurate positioning and labeling.