Quality preservation period: 3 years (unopened), Food Sanitation Law No.370, No.20 approved, remove coating film and cut as much as necessary. Knead it for 1 - 2 minutes until the color becomes even. After it adheres, embed and mold it by pushing it against the filling area. It starts to cure after 5 - 10 minutes and hardens after 15 - 20 minutes. More than 1 hour after it cures,you may start processing such as cutting off a tap, buffing and coating.