Can you repair cracked glass cup? Short cracks can rapidly develop into long ones that spell the end of the entire glass item. But you can quickly and inexpensively repair that glass and stay ahead of complete replacement with epoxy and a utility knife blade.
Can you melt cracked glass back together? Can’t you just melt it back together? Fixing broken glass by melting it back together may seem like a logical thing to do… But believe it or not, heating-up and melting back together glass is incredibly difficult if not impossible. There are too many complicated technical challenges for this type of repair.
How can I temporarily fix cracked glass? Packing tape, masking tape, or duct tape can be placed over the cracks. This will hold the glass together and keep things from getting worse until you have a new window. Tape both sides of every crack. If there is too much to tape it all, then you can use cardboard to cover the glass.
How do you fix two pieces of broken glass?