ThermalSeal RT™ Sealing Films for Real-Time PCR Non-Sterile -Brilliant" ultra-high optical clarity -Heat resistant, recommended for temperatures from -40 °C to +120 °C -Certified DNase-, RNase-, and nucleic-acid-free ThermalSeal RT™ sealing films combine an optically transparent polyester sealing film with a strong, ultra-smooth, non-absorbing, non-fluorescing medical-grade adhesive for superior performance in real-time PCR applications. In place of the customary paper backing, ThermalSeal RT sealing films have a plastic liner which is easily removed before use and contributes smoothness and extreme optical clarity to the adhesive. Dimensions are 79.4 by 142.9 mm for sealing PCR plates. Length between the perforations with end tabs removed is 121.9 mm.