1. 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); [syn: sealant, sealer]
WordNet (r) 3.0 (2006):
sealant
n 1: 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) [syn: sealant, sealer]