When buying windows, many people focus on appearance and price, but few ask:

Is this vacuum glass really under vacuum?

The question may sound overly serious.

But once you understand how important edge sealing is, you will see why it deserves a serious answer.

SuperVIG® goes one step further than you might expect—

We do not just tell you it is under vacuum; we let you see it in real time.

1. The Lifeline of Vacuum Glass Is on the Edges

The principle of vacuum glass is not complicated:

The space between two glass panes is evacuated, removing the medium for heat conduction and providing much better insulation than ordinary insulating glass.

But this raises another question—what keeps the vacuum sealed between the two panes?

The edge seal is only a few millimeters wide and a fraction of a millimeter thick, yet it determines whether the entire vacuum glass unit can maintain its vacuum over time.

With the right edge-sealing material, vacuum remains longer.

With the wrong material, it becomes little more than “pseudo-vacuum” glass that will deteriorate shortly.

2. Edge Sealing Is Underrated

There are currently three main edge-sealing technologies used for vacuum glass.

Method 1: Glass-Frit Solder Sealing

This was the earliest widely used sealing technology.

Because the material has a composition similar to glass, its thermal expansion coefficient should theoretically be compatible, which sounds reasonable.

However, glass frit is brittle, and the residual stress generated during sealing is difficult to eliminate.

Temperature changes or external impact can therefore cause the seal to crack.

More importantly, these materials usually contain lead to reduce the sealing temperature, making compliance with international environmental standards such as RoHS and REACH difficult.

Method 2: Silver Paste + Alloy Sealing

This method adds a metallic transition layer to conventional glass-frit sealing, improving bonding strength to some extent.

However, the organic solvents in silver paste may not fully decompose during sintering.

Under UV exposure, the remaining organic material can continue to release CO₂ and water molecules, gradually consuming the built-in getter and reducing the thermal performance of the vacuum glass over time.

Silver-alloy seams may also be subject to electrochemical corrosion in acidic or alkaline environments, raising concerns about long-term durability.

Method 3: All-Metal Sealing

This is the technology selected by SuperVIG®.

Why does SuperVIG® use all-metal sealing?

The core of all-metal sealing is a true metallurgical reaction between the active solder and the glass substrate, creating a chemically bonded interface layer.

This is not physical wetting.

It is not mechanical interlocking.

The materials genuinely bond together at the material level.

The interfacial compounds formed during the reaction have thermal expansion coefficients that closely match that of soda-lime-silica glass:

MO₂: approximately 9.5 × 10⁻⁶/°C

MSi₂: approximately 8.2 × 10⁻⁶/°C

Glass: 8.5–9 × 10⁻⁶/°C

This fundamentally reduces the risk of seal cracking caused by thermal stress.

The measured shear-strength data speak for themselves:

The shear strength of an all-metal seal is nearly six times that of a glass-frit seal.

3. But Shear Strength Is Only the Beginning

SuperVIG® has also done something no one else in the industry has done before.

No matter how reliable the edge seal is, users still cannot see the vacuum status inside the glass.

This has long created a trust gap across the vacuum-glass industry:

When manufacturers say, “The vacuum level meets the standard,” users can only take their word for it.

When manufacturers say, “The service life is 30 years,” users can only wait and see.

SuperVIG® decided to close this trust gap.

4. An Embedded Chip Makes the Vacuum Level Visible

SuperVIG® can be equipped with an ultra-thin high-vacuum sensor chip inside the vacuum glass.

Customers can choose whether to include this customized feature.

The chip is thin enough not to affect the glass structure or visibility.

Hidden near the edge or frame, it continuously measures the vacuum level inside the cavity and transmits the data to a terminal device.

What does this mean?

① Check the Vacuum in Real Time

You do not need to rely on anyone’s promise.

Open your phone and view the current vacuum reading for your window.

The data shows whether the glass is truly under vacuum.

② Service Life Changes from an Estimate to Data

In the past, the service life of vacuum glass could only be estimated through accelerated aging tests.

Now, the SuperVIG® vacuum sensor can continuously record changes in vacuum level.

Service life is no longer just a theoretical number but is reflected in real data trends.

③ Automatic Alerts for Abnormal Conditions

If the vacuum level changes abnormally, the system automatically issues an alert.

Problems can be identified at an early stage instead of being discovered only after the glass begins to fog.

④ Verifiable Quality Assurance

For engineering projects and commercial buildings, SuperVIG® vacuum-sensor data can provide objective evidence for project acceptance and warranty verification.

Quality claims no longer need to rely on words alone.

A Simple Comparison

Your car dashboard shows the fuel level, coolant temperature, and tire pressure.

You would not accept a car without a dashboard because you need to know its condition.

The SuperVIG® vacuum sensor is the “dashboard” for your window.

For the first time, it gives a silent piece of glass the ability to report its own condition.

Sensor Showing Vacuum Data

SuperVIG® believes the value of vacuum glass is not defined solely by its specifications when it leaves the factory.

What matters is whether it is still under vacuum ten or twenty years later.

The edge seal is where this promise begins.

The sensor is what verifies that promise.

One final point deserves repeating:

Many companies in this industry claim their glass is “vacuum glass.”

Currently, only SuperVIG® lets you take out your phone and view the vacuum reading in real time.

Vacuum glass should contain a real vacuum.

A promise should be something you can see.

SuperVIG®

Visible Vacuum Data. And Reliable Service Life.