sealer
1 of 2noun (1)
seal·er ˈsē-lər 
1
: an official who attests or certifies conformity to a standard of correctness
2
a
: a coat (as of size) applied to prevent subsequent coats of paint or varnish from sinking in
b
: a compound applied to grout especially to repel moisture and prevent staining
Cleaned or newly colored grout will stay that way longer, and be easier to clean, if the grout is coated with a sealer.
Gene Austin
Gene Austinsealer
2 of 2noun (2)
: a person or a ship engaged in hunting seals
Word History
First Known Use
Noun (1)
15th century, in the meaning defined at sense 1
Noun (2)
1770, in the meaning defined above