ELISA Plate Sealers are adhesive sealing films designed to securely cover microplates during enzyme-linked immunosorbent assay (ELISA) procedures. These sealers help prevent sample evaporation, contamination, and well-to-well cross-contamination during incubation steps, ensuring consistent assay conditions and reliable results. ELISA plate sealers are typically made from optically clear or opaque adhesive materials that form a tight seal over standard 96-well or 384-well plates while still allowing easy removal without damaging the plate or disrupting samples. By maintaining a controlled microenvironment within each well, plate sealers help preserve reagent concentrations and assay integrity during incubation, shaking, or storage. ELISA plate sealers are widely used in immunoassays performed on ELISA plates, including assays measuring cytokines, antibodies, hormones, and other soluble biomolecules in serum, plasma, or cell culture supernatants in research, diagnostic, and high-throughput screening applications.