Amazon.com: The Crafters Workshop Gesso Medium, Surface Preparation and Primer, Sealer for Canvas, Paper, Wood, Provides Sizing for Acrylic or Oils, Gesso, 8-oz, Clear
ProteShield 5 gal. Elastomeric Waterproof Sealer PSHLD5G - The Home Depot
Amazon.com: Mod Podge Spray Acrylic Sealer that is Specifically Formulated to Seal Craft Projects, Dries Crystal Clear is Non-Yellowing No-Run and Quick Drying, 12 ounce, Gloss
Aleene's Original Glues - Aleenes Gloss Spray Acrylic Sealer
How to Seal an Acrylic Painting
Amazon.com: The Crafters Workshop Gesso Medium, Surface Preparation and Primer, Sealer for Canvas, Paper, Wood, Provides Sizing for Acrylic or Oils, Gesso, 8-oz, Clear
Amazon.com: Protex World Convertible Soft Top Canvas Waterproofer 500 Milliliter - Seals and Protects : Automotive
Iosso Water Repellant – Canvas Waterproofing Treatment (Indoor/Outdoor) 1 Gal.