How to Paint on Slate Plaques

Slate has traditionally been used as a roofing material or as flooring for outdoor and indoor walkways and stairs. Slate plaques can also be used as decorative pieces to adorn almost any area of the home, from a welcome sign outdoors to an homage that represents a cherished pet. Painting slate properly will ensure that the paint adheres to it effectively and that the piece remains vibrant for several years to come.

Clean off the slate piece with soapy water and a kitchen sponge. This will prepare the slate to accept the paint more effectively.

Allow the slate to dry completely.

Cover the surface of the slate with a coat of acrylic paint. Acrylic will stick to the slate more effectively than water-based paint.

Allow the paint to dry before adding details to the slate plaque. Apply shapes and designs to the slate freehand or with the help of a stencil.

Allow the painted designs to dry completely. Apply a thin layer of synthetic slate sealant, which can be purchased at home improvement or hardware stores, with a paintbrush.

Apply a second coat of sealant, if desired.


A second coat of acrylic base paint can be applied to the surface of the slate if a single coat is not adequate.

Things You'll Need

  • Soapy water
  • Kitchen sponge
  • Acrylic paint
  • Paintbrushes
  • Stencil
  • Slate sealant
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About the Author

Residing in Chippewa Falls, Wis., Jaimie Zinski has been writing since 2009. Specializing in pop culture, film and television, her work appears on Star Reviews and various other websites. Zinski is pursuing a Bachelor of Arts in history at the University of Wisconsin.