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NC State Extension

Caulk – Defined

  • Used for sealing cracks and gaps between two non-moving or stationary parts.
  • Involves using a semi-solid soft material that is squeezed in the cracks and gaps to block and seal them.
  • Seals air leaks for a long time.
  • Caulk is used for smaller holes up to 1/4 inch and expanding foam is used for larger holes.
  • Many types of caulk are available and it is important to choose the right type for the environment. Silicone caulk is a good choice for outdoor use because it is waterproof and flexible and it will not shrink or crack. Consult a guide or knowledgeable person on the correct type of caulk for the job.
  • When used in reference to caulking, a bead is simply a line of caulk.
  • If you have an opened, but not empty, tube of caulk when you’re finished, a nail or caulk saver can be used to seal the tube.

Caulking and Weatherstripping / Calafateo y sellado térmicoImage - Caulking and Weather Stripping

Why Caulk and Weather Strip? In a well-insulated home, air leaks are the greatest cause of wasted heating and cooling energy. Caulking and weather stripping are effective ways to rid your home of costly drafts, making our homes more comfortable and energy efficient.

Common Caulking Compounds