Question

what do mean by sealing​

Answer 1

Answer:

a device or substance that is used to join two things together so as to prevent them from coming apart or to prevent anything from passing between them.

Answer 2

Explanation:

A device or material that is used to close off or fasten an opening or connection, especially to prevent the escape of a liquid or gas: used caulk as a seal around the window. b. An airtight closure: a door that lacks a tight seal.