sealer

Noun
  1. A kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface) (synset 114729879)
    is a type of: sealing material - any substance used to seal joints or fill cracks in a porous surface
    subtypes: caulk, caulking - a waterproof filler and sealant that is used in building and repair to make watertight
    same as: sealant
  2. An official who affixes a seal to a document (synset 110586696)
    is a type of: functionary, official - a worker who holds or is invested with an office

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