sealant

باللغة العربية: مادة مانعة للتسرب، مادة عازلة

1. Any material used to seal a surface so as to prevent passage of a fluid. (countable, uncountable)
2. A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected. (countable, uncountable)

الجمع sealants