This laboratory sealing film always fits. It stretches up to 200 % and clings even around irregular shapes and surfaces. Helps to protect against spills. PARAFILM® M used properly will minimise leakage due to a vessel accidently knocked over. PARAFILM® M is free of plasticisers and consists primarly of polyolefins and paraffin waxes. PARAFILM® M is resistant up to 48 h against many polar substances, e. g. saline solutions, inorganic acids and alkaline solutions. PARAFILM® M conforms to the provisions of the USA FDA Food and Drug Administration when used below 55 °C and observance of GMP (Good Manufactoring Practice). Temperature range (continuous use): - 45 to + 50 °C.