Create a tough, waterproof, and chemical-resistant seal on your labware with DuraSeal™ laboratory stretch film. This strong and tear-resistant sealing film is designed to be stretched over the openings of test tubes, flasks, beakers, and other containers, where it contracts to form a secure, drum-tight seal. Unlike paraffin-based alternatives, DuraSeal™ is heat-resistant and will not melt in boiling water baths, offering superior durability for a wider range of applications. Key Features & Benefits Superior Chemical Resistance: Provides an excellent barrier that is resistant to virtually all common laboratory solvents, acids, and caustic agents. Heat & Tear Resistant: The durable LDPE material can withstand boiling water baths without melting and can be elongated significantly before breaking. Creates a Tight, Waterproof Seal: When stretched over an opening, the film contracts to create a secure, waterproof barrier, protecting contents from evaporation and contamination. Self-Clinging & Easy to Use: The film clings to itself and does not have any inter-leaf paper to remove, making application quick and simple. Versatile Application: An essential tool for sealing test tubes, flasks, beakers, petri dishes, and a wide variety of other laboratory containers.