What does sealant mean?
A substance used to make a surface watertight or airtight, or to fill gaps or cracks in a surface. A sealant is often used to prevent water or air from entering a joint or gap.
Example
"The contractor applied a sealant to the window frame to prevent water from seeping in during heavy rainfall."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.