What is Heat-Resistant Glass?

March 9, 2015

During ads and promotions these days, we often get to hear the term heat-resistant or heat-protective. However, few of us know what it actually is and how it can be used in our homes. So here are the details to educate you on its various aspects.

Defining heat-resistant glass

Heat-resistant glass is also known as fire-resistant since it is resistant to heat, fire and thermal shock. It is sturdier than ordinary glass, making it a better suited option for cooking, industrial and construction purposes where temperature fluctuations may shatter ordinary glass. It generally consists of some heat-resistant materials such as silica or soda lime which have high melting point and extremely low expansion-coefficients. This treatment makes the glass extra durable, especially in areas that witness extreme climate changes.


There are several varieties of heat-resistant glass available that offer various protection levels to suit your needs. There are the naturally tempered and chemically tempered glasses; both can withstand heat up to 450° F and the only point of difference lies in the treatment and thickness. In areas with high temperatures, quartz glass is the best option since it can bear up to 1700°F to 2200°F of heat. For cook tops and wood burning stoves it is best to use pyroceram which tolerates temperature up to 1300°F to 1427°F. In ovens or fireplaces, pyrex is the best option with its heat tolerable index lying between 450° F and 914° F.

Features and benefits

  • Just because heat-resistant glass does not fall under the category of ordinary glass it does not mean that there is dearth of options. There are several sizes and shapes to choose that include curved and bent configurations.
  • Can bear high temperatures making it perfect for protection against fire. This increases the safety factor of a building since it prevents smoke and fire from spreading. It is especially suited for use in high temperature zones such as kitchen cook tops, ovens, etc.
  • It is thermal shock resistant, so any sudden fluctuation in temperature can be handled and there are lesser chances of crack developing.
  • Generally these glasses come free off heavy metals or arsenic making them perfectly safe to be used anywhere.
  • It is available in a vast range of heat-protection factors, colours, etc. Even the thickness can vary according to your selection. You can also opt for a clear or a mirrored finish.
  • Despite its unusual properties it does not need any special attention. In fact normal glass cutters can be used to cut it. Maintenance is simple.

It is always a better idea to install heat-protective glasses in areas that have to bear the brunt of high temperature. Its strength can improve the longevity where it is put up.

March 9, 2015

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