Synonym: breathable sealing membrane, cell culture, microplates, microwell plates, multi-well plates, multi-well sealing film, plate sealers, plate sealing film, sealing film, tissue culture. Medical grade polyurethane membrane with FDA-approved acrylic adhesive pre-cut to fit standard multiwell plates. The membrane is permeable to oxygen, carbon dioxide and water vapor, creating separate, highly uniform microculture vessels from a multi-well plate.