sealant

1. (countable, uncountable)Any material used to seal a surface so as to prevent passage of a fluid.

   Dichtungsmittel, Dichtstoff

   герме́тикgermétik

   герме́тикhermétyk

   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)

2. (countable, uncountable)A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.

1. Wood left outdoors should be dried off and properly finished with sealant before the rot sets in.

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