has been caulking

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of caulk (3rd person singular).
  caulk

  verb (used with object)

  to fill or close seams or crevices of (a tank, window, etc.) in order to make watertight, airtight, etc.

Related Words

• block
• shut
• shutter