Zips again, as a Ziploc bag

• Closes again, as an envelope
• Renders hermetic again
• Caulks again, e.g
• Closes back up
• Fastens anew
• Puts the lid back
• Closes an envelope again, e.g
• Makes airtight again
• Caulks over

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: reseal )