Allows anyone to fix a damaged windshield or window. No heating is required! The reinforced sealant dispensing for head eliminates the need to mix ingredients. Fills the cracked glass with resin to visibility. Do not work on a hot windshield, park vehicle in shaded area and open for windows to cool glass surface. This powerful resin filler effectively fixes different types of chips and cracks such as , Cobwebs, , Half-moon, Star breaks, and more. The advanced resin formula eliminates the appearance of chips and cracks and stops them from spreading. Perfect for multiple repairs. Works on phones and mirrors too.