How to Paint Over Urethane Caulking

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Urethane caulk is often used by professional contractors and homeowners because of its durability and flexibility, and because it is water-resistant and can be painted. Urethane caulk will adhere to almost any surface, so you might find that it's been used in many areas of your home. If you're remodeling an area and replace the existing caulk with urethane caulk, you can paint the urethane caulk to match the adjacent surfaces.

Things You'll Need

  • Cotton ball
  • Rubbing alcohol
  • Paint
  • Make sure the caulk has completely cured. Urethane caulks do not dry--they cure. Curing requires moisture in the air, so if you live in a very dry climate, you may have to wait several days to be certain the caulk has completely cured. At a minimum, you should wait two days before painting the caulk with water-based paint and seven days before painting the caulk with oil-based paints.

  • Dampen a cotton ball with rubbing alcohol and wipe the caulk to remove dust and dirt. Allow the caulk to dry completely.

  • Paint the caulk with your selected paint. Allow the paint to dry completely before determining if you need to apply another coat of paint.

Tips & Warnings

  • To speed up the drying process of urethane caulk in dry climates, place a humidifier in the room.
  • It is nearly impossible to remove caulk from clothing, so be careful when handling it.

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