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Heat resistant pyroceram glass is a perfect choice for fireplace inserts. It is made from a patented Borosilicate formula (similar to Neoceram, Pyrex, and Robax), delegating it a superior, shatter resistant material under drastic temperature changes. The thermal shock rating of 1380° F makes it appropriate for gasketed stove applications. We offer our 3/16" thick, amber tinted pyroceram in a variety of shapes and sizes to suit a number of specifications. Our glass has a seamed edge finish, which has been lightly sanded to smooth off any sharp areas.

Some important things to remember:

  • Glass expands when heated! Please request your cut of glass to be at least 1/8" shy of the mounting surface. This measurement will allow for a safe thermal expansion. We cannot be held responsible for breaks due to improper calculations!
  • Metal screws and mounting hardware also expand when exposed to high temperatures! To avoid damage to your glass when your appliance is in use, please do not over-tighten hardware. We cannot be held responsible for breaks due to hardware that has been secured too firmly.
  • Please submit any additional information, questions, or concerns you may have about your online glass request to the "Notes" box on this product page.


What if the glass that I need is not perfectly square, and needs to be cut to a pattern?

We offer a selection of popular pattern cuts up to 36" x 20" for your fireplace insert. If you need something a little more specific, give us a call at 1-888-986-1535. We have the ability to cut your glass to fractional measurements that may not be listed on our product pages.

Can I install tempered replacement glass for my fireplace insert?

Tempered glass is a higher strength solution compared to pyroceram. However, please keep in mind that it is only rated to 400° F. Therefore, we highly recommended if for factory zero-clearance fireplaces only, rather than fireplace inserts.

I have a masonry fireplace. Can I use a pyroceram option for my replacement glass?

Some masonry doors are rated for ceramic glass doors. Please check with your appliance's owner manual for details on masonry door replacement glass. If the information does not clearly state that the doors are APPROVED for ceramic glass, we highly recommend avoiding this option!

For all of your pyroceram glass needs:
  • We recommend a flat fiberglass gasket and high temperature cement for most installs. However, if your fireplace insert requires a rope or tadpole gasket, we have these options available, as well.
  • Need a custom size? We'd be happy to oblige! Simply call us at 1-888-986-1535 for more information! 

Fast Replacement Glass specializes in custom cut glass to fit your application, no matter what the brand and model! In no time, you'll be able to enjoy the beauty of the fire, along with the comfort of knowing that your new pyroceram glass meets all safety standards.