How to Make Craft Paint Waterproof: 3 Ways (Step by Step)

Waterproof craft paint is made of acrylic resin, pigment, and water. It’s tough, and quick-drying, and applying multiple layers makes painting waterproof, fade-resistant, crack-resistant, and peel-resistant. For outdoor use, check out the following acrylic paints as the ultimate waterproof craft paint solution.

How to Make Craft Paint Waterproof

You can check details about acrylic paint on Wikipedia.

Best Waterproof Acrylic Paint for Outdoor Crafts

Paint Features Water Resistance
Liquitex Professional Heavy Body Acrylic Paint Premium, High paint pigment Great
Golden Heavy Body Acrylic Paint Premium, High paint pigment Great
Winsor & Newton Professional Acrylics Cheap, Lot of color available Medium

Best Waterproof Acrylic Paint for Outdoor Crafts: 10 Second Summary

  • Best Overall: Liquitex Professional Heavy Body Acrylic Paint and Golden Heavy Body Acrylic Paint are perfect choices. Heavy pigment load and creamy consistency make them highly water-resistant and premium.
  • Best Alternative: Winsor & Newton Professional Acrylic Paint is a good artistic grade paint with many color options at an affordable price. However, applying a sealer or mixing with a medium can make it strongly waterproof.

Pro tip: Choose the highest grade labeled as “exterior” or “weather-resistant” paint. If you need more strength, choose marine-grade acrylic paint. Apply a proper sealer coat to make it completely waterproof.

Mixing Paint with Polymer Medium: Step by Step

Acrylic paint durability and water resistance can be increased with polymer mediums, the main ingredient of which is acrylic resins. It improves adhesion and flexibility, making it ideal for outdoor painting or weather-exposed murals.

How to Mix Polymer with Acrylic Paint?

  1. Gather Materials: Acrylic Paints, Polymer Medium, Mixing Palette or Plate, Palette Knife or Brush.
  2. Mixing Paint and Polymer Medium: Put the desired amount of acrylic paint on the paint palette. Then apply slowly and a small amount of medium each time. Mix with a palette knife.
  3. Test the Mixture: Apply a thin layer on paper or cardboard and let it dry to ensure desired results.
  4. Apply the Mixture: Apply the paint to your artwork with a paintbrush or palette knife. Let it dry completely before applying additional layers.

Pros of Applying Polymer

  • Make strong water-resistant
  • Improved durability
  • Very easy to apply

Cons of Applying Polymer

  • Can change the appearance

Pro tips: Applying a sealer on the top coat of paint will make it ultimately waterproof.

Apply Sealer: Step by Step

Applying a sealant on top of acrylic paint is very important for outdoor use. It creates a protective barrier that keeps water from penetrating the paint layer.

How to Apply Spray Sealer?

  1. Prepare the surface: Ensure the top layer is clean and dry.
  2. Shake the spray sealant can: Shake well before applying.
  3. Apply the spray sealant: Hold the can 8-10 inches away and spray in a sweeping motion. Apply in thin layers and let it dry between coats.
  4. Allow the sealant to dry: Allow 4-24 hours before exposing to water.

How to Apply Brush-on Sealing?

  1. Select the ideal brush-on sealer: Choose a varnish or resin that adheres to acrylic paint.
  2. Prepare the surface: Clean and dry the surface.
  3. Apply the Varnish: Apply in a thin and even layer with a clean brush.
  4. Allow the sealant to dry: Let it dry completely, following the manufacturer’s instructions.
  5. Apply a second coat: Apply a second coat if necessary for maximum protection.


  • Great for large surfaces (spray sealer)
  • UV-resistant (brush-on sealer)
  • Durable


  • Some spray sealants contain harmful chemicals
  • Need experience to apply (brush-on sealer)

Bottom Line

Waterproofing craft acrylic paint is an art in itself. With the right materials and techniques, you can create outdoor masterpieces that withstand the elements. Whether you choose to use water-resistant acrylic paint, mix with polymer medium, or apply a sealer, each method offers unique benefits and considerations. Happy painting!

Leave a comment