How To Repair A Chipped Glass Cooktop

I’ve dropped a glass jar on the edge of my black glass cooktop and chipped the edge of it. The chip is approximately 3cm wide and about 7mm deep, roughly semicircular in shape, extending all the way through the cooktop from top to bottom (about 5mm I guess). The chip is nowhere near any area that gets hot.

If something similar to the above situation has happened to you, then you’ve probably scoured the internet looking for a DIY fix only to find the the common solution was complete replacement of the cooktop. Replacing an expensive cooktop for a minor cosmetic flaw sound crazy to you? Don’t worry! We’ve found some alternative solutions for how to fix a chipped glass cooktop, provided that the damage is not in an area that gets hot.

The most important thing to remember is: whatever you do, fix any chips and / or cracks ASAP.

We incurred a tiny chip on our ceramic stovetop after my husband dropped a glass bottle on the edge. We assumed it was only a cosmetic issue and let it go. But then one day I moved a heavy pot of boiling water onto the chipped area and BOOM!, I get a huge crack across half the stovetop.

1. Buy a frame for your cooktop

If the crack or chip is located somewhere on the perimeter of the cooktop (this seems to be what happens in most cases), then you can search for a frame that will cover the crack or chip and protect your cooktop from further damage. If you do a search online, you should be able to find a frame that is suitable or even specific to your particular cooktop. A cheap frame can be purchased from around $55 while a top of the line one might cost as much as $500, which is still cheaper than replacing the entire cooktop. Just remember, the frame is usually for aesthetic purposes only and will not support the weight or aid in the function of the cooktop.

2. Repair the section using silicone or putty

Sandpaper can be used to remove loose pieces and smooth out the crack. A ceramic or silicone filler mixture can then be used to fill the crack in. Epoxy is not recommended since it would need to be sanded down, which could lead to more scratches on the cooktop.

Some recommendations that were given include:

  • Loctite repair putty - you can paint it black afterwards so that it matches the cooktop
  • Windscreen repair kit (like this one from JBWeld) or call an auto glass company to come repair it
  • “White” porcelin touch up. It is thick enough to fill a small chip.
  • A new thermal adhesive from Cotronics, for example there is one for quartz light repairs that is good up to 2400 degrees
  • Porcafix - Add a layer at a time and let each coat dry before applying the next
  • High heat silicone sealant, like this Rutland Black, found at Ace Hardware
  • Exhaust sealant, this silicone is even more heat resistant
  • Gorilla glue clear (if you still have the pieces to glue together)

Also, if the repair putty or sealant is white, you can paint it after it has dried using auto paint or a lacquer based paint. One user even mentioned using a glossy black nail polish!

Good luck and let us know in the comments if you have any other suggestions or if one of the above worked for you!

So... what do you think? Please leave me a comment.

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