Related Clues:

• Stamped as authentic
• Fastened as in S.W.A.L.K.
• Leased in secured state
• Secured against leakage
• Closed up, watertight
• Closed tightly, maybe with wax
• Might the dog do the wrong thing in a row?
• Marine went ahead and stopped up
• Family keeps nearly everything secured
• Closed (of lips, envelope, tomb etc)
• Closed with authority
• Like an envelope that's ready to be mailed
• Closed securely
• Having made impenetrable by water, went ahead
• Lots of water was first stopped from leaking