How to Waterproof Outdoor Decorations

Outdoor decorations are subjected to moisture, temperature variances, sun and other elements that may cause them to deteriorate.
Create water barriers on your outdoor decorations with waterproofing paint, clear waterproof sealer or a block and wall sealant. Whether your outdoor decorations are made out of wood, metal, concrete or acrylic, take a little time to protect them from the elements so you can enjoy them as long as you like.

Step 1

Clean the surface of your outdoor decorations to remove any mildew, debris, rust or other stains. A power washer will remove mildew, loose particles and some stains, but you'll need to scrub rust with a wire brush to remove it. Depending on the type of material you are cleaning, a 50/50 mixture of bleach and water may help remove stains. Sand wood surfaces if they are rough with a hand sander and medium-grade sandpaper.

Step 2

Repair any imperfections that may allow the sealant or waterproofing paint to sink into the surface of your decorations. This would include a hole in a concrete statue or an open notch in an outdoor wooden planter. Wood fillers and concrete repair kits are commercially available for small repairs. Follow the manufacturer's directions and allow the repair medium to dry or cure completely before you apply the waterproof material.

Step 3

Apply the appropriate waterproofing medium for the type of construction material that your outdoor decorations are made from. You may prefer to use a block and wall sealant for outdoor concrete structures and a clear waterproofing sealer for wood or plastic decorations. Waterproofing paint works on a variety of surfaces. Follow the manufacturer's directions for each application.

Step 4

Paint over clear waterproof sealer with latex or oil-based paints to add another layer of protection as well as a design element to your outdoor decorations.

Things You Will Need

  • Power washer
  • Water
  • Wire brush
  • Bleach
  • Bucket
  • Sandpaper and sander
  • Repair material
  • Waterproofing paint
  • Clear waterproof sealer
  • Commercial block and wall sealant
  • Paintbrush or sponge

About the Author

Katherine Kally is a freelance writer specializing in eco-friendly home-improvement projects, practical craft ideas and cost-effective decorating solutions. Kally's work has been featured on sites across the Web. She holds a Bachelor of Science in psychology from the University of South Carolina and is a member of the Society of Professional Journalists.