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English definition of “sealant”

sealant

noun [C or U]     /ˈsiː.lənt/
a substance such as paint or polish that is painted onto a surface to protect it from other liquids going into it, or is put in the space between two materials for the same reason Building materialsCoverings and layers
(Definition of sealant noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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