Glass Chalk The Original Patented Indoor/Outdoor Temporary Paint Marker for Auto Windows and Glass Surfaces, Sponge-Tip, Assorted Colors, White and Yellow, 2 Count Glass Chalk Original are the ORIGINAL INDOOR AND OUTDOOR Temporary Paint Sponge Markers! Proudly Made in the U.S.A! Our product is temporary for glass surfaces and other non-porous surfaces. Glass Chalk Original becomes permanent for banners, posters, wood, clothing and other porous surface. For removal from non-porous surfaces, just use a damp cloth! No residue is left behind! Our product is certified non-toxic, conforming to ASTM-D4236. Try our patent formula, for better results! BRIGHT, NEON & METALLIC COLORS: Glass Chalk Original uses only high quality water-based concentrated liquid chalk that allows you to write in vibrant colors with smooth lines. GREAT FOR TEMPORARY OR PERMANENT RESULTS: Express yourself on any non-porous surface like glass, windows, mirrors, metal, dry erase boards, chalkboards, light boards, windshields and ceramics or as permanent color on wood, fabric and other porous surfaces. DIY IDEAS & VIDEOS: Our brand not only offers a patent product but also dedicates to inspire new creations through our website in our DIY page. Our customers can find the latest designs and learn step by step on how to create them. If you need help creating something and would like a tutorial, send us a message through our customer service; our team goes to great lengths to ensure customer satisfaction! EASY TO USE, EASY TO CLEAN: Glass Chalk Original is made easy to use by kids and adults. Your masterpiece on non-porous surfaces will remain intact through the rain. To create another masterpiece, Glass Chalk Original comes off non-porous surfaces easily with the use of a wet damp cloth!