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sealants, including caulk

Caulk is the sealant used to make things water or air tight. It can protect joining corners in the bathroom from allowing water to leak through and cause water damage. It can also seal windows, providing better insulation.

Types of caulk

From About.com and the U.S. Department of Energy articles listed below under references

  • Latex (comes in Acrylic and Vinyl latex versions)
  • Silicone: Household
  • Silicone: Construction
  • Butyl Rubber
  • Polyurethane, expandable spray foam
  • Urethane
  • Water-based foam sealant
  • Oil or resin-based

Application hints


  • if the caulk is too cold, heat it by putting the tube in warm water; when applying to windows, it works best if the temperature outside is at least 45 degrees Fahrenheit
  • old caulk may not work well
  • it will adhere best to a clean, dry surface (get rid of old caulk first with a razor or putty knife)



  • DIY with over 50 articles and tips regarding caulking
  • Wikipedia's article on caulking