Heat Resistant Glass 4 mm ROBAX – Stove & Fireplace Glass

Heat-Resistant Ceramic Glass 4 mm

This 4 mm heat-resistant ceramic glass is specially designed for fireplaces, stove doors and other heating appliances operating at very high temperatures. Unlike ordinary tempered glass, ceramic fireplace glass can withstand continuous heat exposure up to 800 °C without breaking or deforming.

The glass is manufactured from ROBAX® ceramic glass, a premium material widely used by stove and fireplace manufacturers across Europe.

ROBAX glass is known for its excellent heat resistance, stability and long service life, making it one of the most trusted materials for replacement fireplace glass and stove door glass.

The 4 mm thickness is suitable for most standard fireplaces and stoves. A thicker 5 mm version is recommended mainly for larger glass panels or installations where additional mechanical strength is required.

Premium German Quality – ROBAX® Ceramic Glass

ROBAX® ceramic glass is considered one of the highest-quality heat-resistant glasses available. It offers several key advantages:

- heat resistance up to 800 °C

- excellent dimensional stability under high temperatures

- strong resistance to thermal shock

- long service life and durable material structure

- crystal-clear and undistorted view of the fire

- excellent heat transmission from the firebox into the room

ROBAX® glass is a premium ceramic material developed by a leading German manufacturer, ensuring reliability and long-term performance in high-temperature environments. You can find more about the SCHOTT brand on their official website. 

Applications

Heat-resistant ceramic glass is suitable for a wide range of heating appliances and high-temperature uses, including:

- fireplaces and wood-burning stoves

- fireplace and stove inserts

- pizza ovens and bread ovens

- electric and gas ovens

- sauna heaters

- industrial high-temperature equipment

Thanks to its high transparency, the glass provides a beautiful view of the fire while efficiently transferring radiant heat into the living space.

Custom Cut-to-Size Production

Every glass panel is manufactured individually according to the dimensions you enter.

For best accuracy, we recommend entering dimensions in millimetres (mm) and carefully measuring your original glass before ordering.

Width and height can be entered in any order.

Example:

For a glass size of 40 × 40 cm, enter 400 × 400 mm.

Edge Types

By default, the glass is supplied with standard cut edges.

You can choose between several edge options:

Seamed Edges – safer and slightly smoothed edges

Ground Edges – professional appearance and higher precision

Related Heat-Resistant Fireplace Glass Options

If you are looking for other types of heat-resistant glass, we also offer several specialised solutions made from original ROBAX® ceramic glass.

For larger fireplace doors or bigger glass panels, you may consider 5 mm heat-resistant glass, which provides higher mechanical strength and is often used for larger fireplace or stove glass panels.

If you want easier maintenance and cleaner glass during operation, we also offer self-cleaning heat-resistant fireplace glass, designed to reduce soot buildup and keep the view of the flames clearer.

For a more modern appearance, you can choose NightFlame tinted heat-resistant glass, which has a darker look when the fireplace is off but becomes transparent once the fire is burning.

All our fireplace glasses are cut to size according to your exact dimensions and manufactured from premium ROBAX ceramic glass designed for high-temperature applications.

Important Installation Recommendations

When installing heat-resistant glass, it is important to use flat self-adhesive sealing tape 10×2 mm or 10×4 mm. The glass must never come into direct contact with the metal frame or stove body.

Place the sealing tape not only on the frame or glass but also on any clips, brackets or mounting parts to ensure the glass is fully isolated from metal components.

Tighten screws and fixing clips carefully and never overtighten them. Excessive pressure on the glass may cause it to crack.

Incorrect installation is one of the most common causes of glass breakage.

When handling glass panels, always work carefully and consider wearing protective gloves.

Fast Delivery

Orders placed on working days before 12:00 are usually processed the same day and dispatched immediately.

Typical delivery time is 4–5 working days depending on your location.

Need Help Measuring Your Glass?

If you are unsure how to measure your existing stove glass correctly, please check our glass measuring guide on the website.

Correct measurement ensures the new glass fits perfectly into your stove or fireplace door.

Warning - custom-made goods

This is a custom-made product, manufactured according to your specific dimensions.

In accordance with EU consumer protection law (Directive 2011/83/EU, Article 16(c)), the right to withdraw from the purchase does not apply once production has started.

Please ensure all measurements are correct before placing your order, as modifications, cancellations, or returns are not possible after manufacturing begins.