For temporarily sealing beakers, flasks and other vessels. Material thickness: 0.14 ±0.02 mm Elasticity (25 °C): 300% Tear strength (25 °C): 1.5 MPa Melting temperature: >65 °C (151 °F) Boiling point: >288 °C (550 °F) Continuous service temperature: -20 to +46 °C Toxicity: non-toxic The sealing film can be stretched to three times its original length. This means that Seal-R-film™ always fits, even with irregular shapes. Traceability through batch identification per roll. Gas permeability: • CO 2 (carbon dioxide) <1000 cm 3 /m 2 • O 2 (oxygen) <350 cm 3 /m • Water vapour permeability <0.8 g/m 2 (in 24 hours at room temperature and a pressure of 0.1 MPa) Chemical resistance: ammonia (NH 3 ) 28%; ethanol; isopropanol; iodine solution 0.1 mol/l (brown colouring); potassium permanganate (KMnO 4 ) 5% (brown colouring); methanol; sodium chloride (NaCl) 20%; sodium hydroxide (NaOH) 22%; nitric acid (HNO 3 ) 95% (brown colouring); hydrochloric acid (HCl) 36.5%; sulphuric acid (H 2 SO 4 ) 98%; hydrogen peroxide (H 2 0 2 ) 30% Sealing film Seal-R-Film™