How to Repair a Striped Glass

It’s a sunny day and you look through the window, and you notice a crack in the glass. While it may not damage the structure or function of the window, it is annoying. Slight cracks can be removed from the glass with items you can have in your home. Deeper cracks and scratches on glass that compromise the operation of a windshield or window of a house may need to be replaced rather than repaired.


  1. Do the “nail test” before attempting to repair a scratched glass. Drag your nail along the surface of the crack. If it gets hooked, the crack will probably be too deep for home repair. You will need to take your vehicle to an auto shop, buy a new window for your home, or simply live with cracks on surfaces that cannot be replaced.
  2. On a slight crack in the surface of a glass, apply a toothpaste of white color that does not have the consistency of a gel. Be sure to cover the entire crack thoroughly.
  3. Let the toothpaste harden. This will take a few minutes.
  4. Clean the toothpaste with a soft cloth. Polish the torn area in one direction to avoid adding new marks to the glass. In most cases, you will see that the crack has disappeared once you remove the toothpaste.
  5. To repair cracks a little more pronounced, prepare a mixture of white vinegar and ground mustard seeds. You can get these seeds in the spices section of your local supermarket. Start with a tablespoon of dry mustard and add a few drops of white vinegar to prevent the mixture from becoming too moist.
  6. Apply a generous layer of mustard paste and vinegar over the crack, let dry and polish with a cloth.
  7. Purchase a kit for glass repair if scratches are found on the windscreen of your vehicle. These kits can be found in auto parts stores such as AutoZone and usually contain some kind of solvent and a rinse aid suitable for use in glass.