Answer: sealsin

AnswerCrossword Clue
SEALSINEncloses airlessly
SEALSINTapes tightly
SEALSINEncloses tightly
SEALSINBoxes tightly
SEALSINKeeps from escaping
SEALSINCaps or cans
SEALSINEncloses
SEALSINApplies mastic