Can I Use Pyrex In My Air Fryer? | What To Check First

You grabbed a Pyrex dish, filled it with vegetables, and slid it into the air fryer basket — then hesitated, suddenly picturing shattered glass scattered across the heating element. It’s a reasonable fear, especially since online advice ranges from “totally fine” to “absolutely never.”

The honest answer is yes, you can use Pyrex in an air fryer, but safety hinges on which type of Pyrex you own and how you handle the heat. The brand actually makes two different kinds of glass for different markets, and confusing them can turn a handy oven-safe dish into a risky experiment.

The Two Types Of Pyrex Glass

Pyrex has been around for over a century, and the recipe has shifted over time. Original Pyrex was made from borosilicate glass — a highly durable material engineered to handle extreme thermal changes without cracking. This is the same stuff lab beakers are made of.

Borosilicate Vs Soda-Lime

In the 1990s, the US branch switched to soda-lime glass, which is cheaper and stronger against mechanical impact — dropping it on the floor — but significantly weaker against thermal shock, meaning sudden temperature swings. European Pyrex mostly stayed with borosilicate.

Both types are marketed under the same Pyrex name, but they behave very differently inside an air fryer. The difference matters because air fryers rely on intense, direct radiant heat rather than the ambient heat of a conventional oven.

Why The Glass Type Changes The Risk

The fear around Pyrex in air fryers usually boils down to one word: thermal shock. Air fryers blast food with concentrated high heat, and if the glass cannot expand evenly, it shatters. Understanding the factors that influence breakage changes how you approach the dish.

Here is what determines whether a particular Pyrex dish can handle that environment:

• Glass composition: Borosilicate handles rapid heat changes much better than soda-lime. If you have European Pyrex or very old US pieces, you are working with borosilicate. Current US Pyrex is soda-lime and needs gentler treatment.
• Temperature range: Pyrex glass is generally rated from -40°C to +350°C. The key is avoiding *sudden* shifts — placing a cold dish straight into a preheated air fryer is the most common mistake.
• Direct vs indirect heat: Unlike an oven’s ambient heat, an air fryer’s heating element is very close to the food. Soda-lime glass is especially vulnerable to this direct blast in the first few minutes of cooking.
• Dish thickness: Thicker, tempered glass distributes heat more evenly. Thin or older dishes are more prone to hot spots and subsequent cracking under direct heat.
• Pre-existing damage: Chips, cracks, or even microscopic scratches from metal utensils dramatically lower the temperature threshold needed for breakage.

Understanding these factors takes the guesswork out of the decision. You do not have to avoid Pyrex entirely — you just need to match the tool to the task and adjust your preheating habits.

What The Official Guidance Says

The official UK Pyrex site explicitly states their dishes are “ideal for use in air fryers” and lists the full Pyrex temperature range as safely covering typical air frying heat up to 350°C. That is a strong green light from the European branch.

However, the US manufacturer has given conflicting signals. While the official Pyrexhome FAQ notes both soda-lime and borosilicate glass are safe for any temperature called for in standard cooking, some customer-facing communications have warned against the direct heat of air fryers.

The contradiction exists because “safe for cooking” and “safe for direct high-radiant heat with a cold dish” are slightly different questions. Borosilicate handles the difference easily; soda-lime finds it stressful. The official line is that Pyrex is oven-safe. The conservative take is that soda-lime Pyrex requires more care in an air fryer, specifically to avoid thermal shock.

The table above clarifies why some people have used their Pyrex for years without issues while others have had a dish fail. The glass recipe determines the margin of safety, even if the maximum temperature rating is identical.

How To Safely Use Pyrex In Your Air Fryer

You can minimize the risk of breakage by changing a few simple habits around preheating and placement. If you follow these steps, the chance of thermal shock drops significantly:

1. Let the dish come to room temperature: Take the Pyrex out of the fridge or pantry 15 to 20 minutes before cooking. A cold dish hitting hot circulating air creates the most stress on the glass.
2. Preheat the air fryer empty, then load quickly: Alternatively, place the Pyrex into a *cold* air fryer and let it heat up slowly with the appliance. This is the gentlest possible start for soda-lime dishes.
3. Add liquid to the dish: A small amount of sauce or oil helps absorb and distribute heat evenly across the glass surface, reducing hot spots. Dry food on dry glass over direct heat is a riskier combination.
4. Avoid extreme temperature swings: Do not take a hot Pyrex dish directly from the air fryer and set it on a cold countertop, wet towel, or into the sink. Rest it on a dry trivet or wooden cutting board.

Using a Pyrex dish that fits comfortably within the air fryer basket with at least an inch of space around the sides for airflow is also important for even cooking and proper heat circulation.

Borosilicate Vs Soda-Lime: The Real World Difference

The official Pyrexhome FAQ explains that the question is not just about temperature limits but about the specific conditions inside an air fryer. Both types are rated for high heat, but the Pyrex glass types respond differently to the direct radiant heat of an air fryer element.

Identifying Your Pyrex Type

Borosilicate glass was originally used for Pyrex precisely because it could handle the rapid temperature changes of laboratory work and oven cooking. It is the safer bet if you plan to push the upper limits of your air fryer or cook with very cold ingredients straight from the refrigerator.

Soda-lime glass, while stronger against bumps and drops, is inherently less forgiving. The US manufacturer’s own FAQ emphasizes following safety instructions, specifically warning against preheating the pan empty, adding liquid to a hot dish, or using it under a broiler — all practices that create the thermal shock soda-lime glass struggles with.

The Bottom Line

Pyrex can absolutely go in your air fryer, but treating it like an unbreakable metal pan is the mistake. Know which type you own, avoid extreme temperature jumps, and follow the basic safety steps listed here. A little caution goes a long way.

If you cannot confirm the glass type in your particular dish, the safest move is to stick with an oven-safe metal or silicone pan designed for your air fryer instead. There are plenty of excellent alternatives that remove the guesswork entirely.