Sealer vs Polyurethane - What's the difference?
sealer | polyurethane |
A tool used to seal something.
A person who is employed to seal things.
# An officer responsible for sealing writs or instruments, stamping weights and measures, etc.
A coating designed to prevent excessive absorption of finish coats into pourous surfaces; a coating designed to prevent bleeding.
(organic chemistry) Any of various polymeric resins containing urethane links; used in very many industrial and domestic applications.