Miracle Sealants 511 Spray-On 15-fl oz Clear Ceramic/Porcelain Tile Grout Sealer in the Indoor Floor Sealers department at Lowes.com
Renew - Restore Your Ceiling Tiles Instead of Replacing Them-Professional use, Non-Flammable Spray-on White Coating. Remove Ceiling Tile Stains Caused by Water Damage, Smoke and Soil Discoloration: Amazon.com: Tools & Home Improvement