Thin polyester heat sealing film which is easily pierceable with autosampler needles/ABI 3730. The seal is suitable for PCR, qPCR and optical applications. Heat sealing offers a 100% effective method for plate sealing for a complete seal integrity, as well as being quick and cost effective Our ClearASeal Pierce heat sealing film is an optically clear polyester backed film, forming a pierceable seal to polypropylene, polyethylene, polystyrene and cyclic olefin copolymer (COC) plates The optical clarity of this seal enables its use for sealing plates required for imaging use, including fluorescent detection methods such as qPCR and colorimetric assays Its pierceability renders it useful for automation and for use on needle, capillary and tip based liquid handling systems It is effective on the ABI3730 capillary sequencer, removing the need for the use of expensive septa mats The ClearASeal Pierce forms a complete seal to a plate enabling moderately low and high temperature uses, includin