Flexible magnets are excellent for making small and lightweight projects magnetic. Magnet requires direct and full contact with steel for maximum hold. Magnet & adhesive work best when applied at above 60 degrees Fahrenheit or 15.56 degrees Celsius. For best results: 1)Allow magnet to reach room temperature. 2)Peel back liner from the adhesive and place it on a clean surface. 3)Apply adhesive to surface with firm pressure 4)Allow adhesive to cure for a minimum of 24 hours or 72 hours to reach maximum bond with surface. Magnet is not designed to hold cabinet doors. Search on "magnet latch kit" or "latch magnet" for cabinet magnet.