Gasket
The sealing element between a lid or plug and the container.
A gasket makes the seal. Material choice follows the product, the temperature and how long it sits: what suits a water-based food product may not suit a solvent. Gaskets are usually part of the closure specification rather than an afterthought.
Where you meet this term
Conical Steel Drums
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Educational content. Not engineering or regulatory advice — confirm ratings and specifications with your supplier and the applicable regulations.