"Sealing" refers to the act of closing or securing something tightly to prevent air, liquid, or other substances from entering or leaving it. Full definition
All documents required must be original documents, but certified copies with lifted seal of the original documents are acceptable. (chabilmarvillas.com)
I store them in sealed containers in the freezer for whenever I need them. (theorganicdietitian.com)
I have NEVER (knock on wood) had my jam not seal with this method and they have never gone bad. (gooddinnermom.com)