How to Apply Caulk for a Horse Trailer

Horse trailers can become damaged if exposed to the elements for too long without proper maintenance. The roof and window must maintain their water resistance or the trailer will quickly lose its usefulness. If you own a horse trailer or you're thinking about buying one, you can ensure its continued protection from the elements by applying waterproof caulk in strategic locations.

Things You'll Need

  • Polyurethane caulk
  • Caulk gun
  • Flashlight
  • Garden hose
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Instructions

    • 1

      Caulk the seams of the trailer roof from the inside. Each place there is a seam that has been riveted or welded together is a place where water could eventually leak in. Apply a generous bead of caulk around each of these roof seams and smooth it out with your finger, providing full coverage over the entire seam.

    • 2

      Caulk the inside and outside frames of the windows. Inspect each window to make sure that you have covered every corner and seam with a bead of caulk.

    • 3

      Test the trailer for water resistance. After the caulk has been left to dry overnight, spray water on the roof of the trailer and the over the closed windows. Walk inside the trailer with a flashlight, inspecting each seam and window to make sure that no water penetrated the trailer. If you find any small leaks, repeat the process.