1) Better waterproof 2) Cap again 3) Caulk again 4) Close a Ziploc bag 5) Close again 6) Close anew 7) Close back up 8) Close second 9) Close tightly again 10) Close up after steaming open 11) Close up again 12) Close up anew 13) Close up like before 14) Close up securely again 15) Fasten firmly again Found on https://www.crosswordclues.com/clue/reseal