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caulk Synonyms

Another word for caulk

Choosing another word for caulk depends on context, so the synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
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• noun (Context 1)

A waterproof filler and sealant, used in building work and repairs to seal gaps, joints, or seams against moisture and air.

Usage Example

"The contractor applied a fresh bead of silicone sealant around the bathtub to prevent water from seeping into the wall."

Strongest
sealant
Strong
filler
mastic
putty

• verb (Context 2)

To seal a gap, seam, or joint in a building, structure, or fixture with a waterproof filler.

Usage Example

"Before winter arrives, you should seal the window frames to keep cold drafts out of the house."

Strongest
seal
Strong
plug
stop
waterproof

• verb (Context 3)

To make the seams between wooden planks in a boat or ship watertight by driving in oakum or cotton and covering it with pitch or tar.

Usage Example

"The shipwrights worked for days to seal the hull of the wooden schooner before launching it into the harbor."

Strongest
seal
Strong
waterproof

• Nearby Words

caucus
caudex
cauldron
caulk
caulking
causal
causality

Cite this Entry

Wordmom. (2026). Synonyms for Caulk. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/caulk
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