some counter-top material are porous, needs re-sealing periodica

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po·rous

?pôr?s/

adjective

 

1. (of a rock or other material) having minute spaces or holes through which liquid or air may pass.

   synonyms:

   permeable, penetrable, pervious, cellular, holey; More

   • not retentive or secure.

     "he ran through a porous defense to score easily"