Heathrow Scientific LLC - Parafilm® M Sealing Film 4 Inch Width X 125 Foot Roll Length, Natural For use with Test Tubes, Beakers, Vials, Petri Dishes, Flasks [1/EA]

Moisture-proof film molds to surface and protects the integrity of research applications with a tight moisture-barrier that holds a strong seal and doesn't release from glassware, despite off-gassing. Non-toxic and free from plasticizers, film is primarily composed of polyolefins and paraffin waxes offering good resistance against acids, alkalis and some organic solvents – use not recommended with acetone, diethyl ether or tetrachloride. Reduce the risk of tampered data with a covering that is odorless, colorless and semi-transparent. Prevents moisture and volume loss due to material composition and tight seal. Flexible and self-sealing material allows it to cling around irregular shapes and surfaces. Stretches to more than 200% of original length. Resistant for up to 48 hours against many polar substances such as saline solutions, inorganic acids and alkaline solutions.