sealant

Plural: sealants

Noun

• A substance used to seal or waterproof a surface.
• a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)
• Any material used to seal a surface so as to prevent passage of a fluid.
• A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.

Examples

• He applied SEALANT to his lead, ensuring his opponent couldn’t catch up.

Synonyms

sealer