Answer: resealed

AnswerCrossword Clue
RESEALEDClosed again, as a plastic bag
RESEALEDZipped again, as a storage bag
RESEALEDApplied more caulk
RESEALEDClosed up again
RESEALEDClosed again.
RESEALEDClosed an opened envelope
RESEALEDClosed anew
RESEALEDTwice-secured
RESEALEDMade more waterproof
RESEALEDClosed after use
resealedRESEAL, to seal again