Is Borosilicate Glass Microwave-Safe?

There are a variety of microwave-safe materials available ranging from Pyrex, ceramic to porcelain dishes that can be used inside the microwave.

I know there are some people who want to know if Borosilicate Glass is one of them or not.

So Is Borosilicate Glass Microwave safe?

Yes, the Borosilicate Glass is microwave safe, dishwasher safe, stain-resistant, and non-porous. In fact, it contains about 15% boron trioxide which also makes Borosilicate resistant to thermal shocks. Borosilicate glass is heat resistant and can be used in the microwave for reheating or cooking, due to its composition the glass can also withstand a sudden change in the temperature without breaking.

In this post, I’ll talk about the use of borosilicate glass in microwaves and what makes it so resistant to heat. 

So without further ado let’s begin!

Will borosilicate glass break if heated in the microwave?

The first thing you should know is that BOROSILICATE GLASS IS MICROWAVE-SAFE but is not unbreakable.

This means that you can use borosilicate glass, dishes, or containers in a microwave oven because they won’t shatter or break from microwave heat

Despite being more resistant to thermal shock than other glasses, the borosilicate glass can still break or crack when exposed to intense, rapid, uneven temperature changes.

Under normal circumstances the borosilicate glass won’t break if heated, also, when you heat up glass, directly from a cold environment like a fridge then chances are that it won’t shatter as borosilicate is more resistant to thermal shock than any other glass type. Normally, borosilicate glass can easily withstand extremely high temperatures without any issue.

Is Borosilicate glass better than regular glass?

Indeed borosilicate glass is way better than regular ones because of the following points:

Borosilicate glass is not as susceptible to thermal shock as regular types of glass, which means they stay strong at higher temperatures and cooler temperatures than other types of glasses, such as soda-lime or lead-crystal glasses.

It resists chemicals and acid degradation, is non-porous, scratch-resistant, dishwasher safe as well as microwave safe.

Borosilicate glass is also lead and BPA-free and non-toxic type of glass.

Is borosilicate microwave safe?

Borosilicate glass is microwave-safe, and most of them are usually able to withstand temperatures as high as 350°C or more without cracking.

Is Borosilicate glass unbreakable?

For the “unbreakable” part, borosilicate possesses an extraordinary strength that can even withstand unusually severe temperature and thermal shock. But that doesn’t mean it won’t break at all.

Under some adverse scenarios, i.e, rapid thermal shock or beating the glass may actually break.


In this post, I have discussed whether it is safe to microwave borosilicate glass or not.

For a quick overview, the answer is yes, it is safe to use Borosilicate glass in the microwave if heated gradually and correctly.

If you have any more questions or queries about Borosilicate glass, feel free to ask in the comments below.