ceiling / sealing are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
ceiling: (noun) the overhead upper surface of a covered space. (noun) (meteorology) altitude of the lowest layer of clouds. (noun) an upper limit on what is allowed. (noun) maximum altitude at which a plane can fly (under specified conditions).
sealing: NA
ceiling: s·IY·l·ih·ng
sealing: s·IY·l·ih·ng
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)