Divinext Parafilm Moisture Proof Sealing Film PM-996 All Purpose Laboratory Film Parafilm 4" x 125' Self Sealing Thermoplastic Semi-transparent, Flexible Sealing Film 4 Inch x 125 Feet 38 gsm Transparent Paper  (Set of 1, Practically colorless)

Parafilm m roll, 125' length x 4 width Length = (ft)125 Width = (cm)10.2 Thickness = (m)38.1 Parameter = -45-+50 °C temp. range Quickly, effectively seals labware Waterproof, moisture-proof film prevents sample evaporation, contamination; protects anhydrous materials Can be folded repeatedly and twisted around sharp surface without rupturing Increases approximately 200 percent when stretched lengthwise at 21°c (70°f) Rolls are interlined with paper to prevent adhering Practically colorless Country of origin: USA Parafilm M used in health care, pharmaceutical and research laboratories for covering or sealing vessels such as flasks, cuvettes, test tubes, beakers, petri dishes and more. Because it melts at a low temperature, Parafilm M is not safe for use in an autoclave. Many organic solvents will dissolve Parafilm M. Parafilm M is wrapped around the freshly cut crown of bananas, pineapples and other produce instead of using fungicides or other coatings to prevent rot. Florists use Parafilm Stem Wrap to extend the flower's life by protecting moisture in the stem as a floral tape. Horticulturalists use Parafilm Grafting Tape in grafting. Several grafting styles call for wrapping a graft to hold it together, and sealing it to prevent drying and Parafilm Grafting Tape does both. In this context, Parafilm is also known as grafting tape. Some modelers use Parafilm M as a masking material during airbrushing, due to its lack of adhesion, which can destroy a finish. Entomologists have used Parafilm M as a membrane to feed hematophagous insects such as mosquitoes and bedbugs reared in the lab. A new application of Parafilm M is to make paper-based micro fluidic devices. Paper-based micro fluidic devices are considered a suitable way to fabricate low-cost point-of-care diagnostics for developing countries and areas where expensive medical instrumentation is not accessible. Digital micro fluidic devices can also use it as the electrode insulator and hydrophobic layer.