Material used for sealing something so as to make it airtight or watertight.
- The sealant made it airtight without pinching his nasal passage.
- Water putty, epoxies, construction glue and silicone sealants can cause irreversible damage to objects, he warned.
- I'll pull the assembly apart (hopefully I can just cut that sealant stuff off) and fill the hole with more sealant.
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