sellando

Sellando is the gerund form of the Spanish verb sellar, meaning the act of closing, sealing, or authenticating something with a seal. It denotes the process of applying a seal or sealing material to prevent passage of air or liquids, or to indicate tamper evidence or certification. Although a verb form, its use appears in technical and formal writing to describe sealing actions.

In practice, sellando appears across several contexts. In packaging and shipping, sealing containers, bottles, or envelopes helps preserve contents and signal tampering. In construction and engineering, it refers to sealing joints and gaps with sealants such as silicone or polyurethane to prevent leaks and improve weather resistance. In systems designed to be hermetic—such as certain electronics, optics, or vacuum housings—the term can describe the creation of a leak-tight barrier. In legal and administrative settings, documents or official items may be sealed to certify authenticity or finalize a procedure, with sellar used to describe affixing the seal.

Related forms include sellado, the noun for the act or result of sealing, and sello, the seal itself. The verb sellar also has figurative uses, such as “sellar un acuerdo” to indicate formally finalizing or formalizing an agreement. Overall, sellando conveys the ongoing action of creating a seal in various practical and formal contexts.