Things You'll Need
Acrylic spray sealer
Whether for planting outdoors or for a different type of display, a wise gardener will prepare her terracotta pots properly before proceeding with the intended project. Because terracotta is porous, it will absorb moisture. Over time, this moisture absorption can harm the surfaces of the terracotta and lead to damage. Proper preparation of the terracotta pots protects their beauty for years.
Wipe the inside and outside surfaces of the terracotta pot with the damp cloth to remove any dirt or dust. Let the pot dry completely.
Spread the newspaper out onto a flat work surface and place the terracotta pot onto the newspaper.
Hold the spray sealer 10 to 12 inches away from the terracotta pot and direct the spray over every inside and outside surface of the pot. Cover the surfaces with an even layer of spray.
Allow the spray sealer to dry, following specific drying recommendations found on the product label.
Apply a second coat of the spray sealer to the terracotta pot, following the same process. Allow the pot to dry completely again.
Instead of a spray sealer, you can apply a liquid terracotta sealer to the inside and outside surfaces of the terracotta pot. Use a paintbrush to apply the liquid sealer, applying it in a thin and even coat to cover all surfaces. Allow the sealer to dry completely and then apply a second coat.
If you use outdoor acrylic paint on your terracotta pot, this will serve as both a sealant and a decorative paint layer over the terracotta pot, making a separate sealant unnecessary.
Apply the acrylic spray sealer in a well-ventilated area to avoid the toxic fumes from the spray.