Miracle Sealants 511 Spray-On 15-fl oz Clear Ceramic/Porcelain Tile Grout Sealer in the Indoor Floor Sealers department at Lowes.com
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
Amazon.com: Aleene's 26412 Spray Gloss Finish, 6 Oz Acrylic Sealer, Original Version : Tools & Home Improvement