Caulk is a sealant. It comes in a tube and is used commonly by plumbers and carpenters trying to seal up cracks where air or water might push through. When a plumber caulks a tub, he's applying caulk to its seams to make it watertight.
See
Verb
seal with caulking; "caulk the window"
v. t. & n.
See Calk.
Caulk
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Usage Examples
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