Below are possible answers for the crossword clue Seal up.
4 letter answer(s) to seal up
SHUT
become closed;
move so that an opening or passage is obstructed; make shut;
not open; "the door slammed shut"
prevent from entering; shut out; "The trees were shutting out all sunlight"; "This policy excludes people who have a criminal record from entering the country"
used especially of mouth or eyes; "he sat quietly with closed eyes"; "his eyes were shut against the sunlight"
Other crossword clues with similar answers to 'Seal up'