How to Seal a Cracked Window for Additional Security

How to Seal a Cracked Window for Additional Security

Oct 9, 2019

Before we go any further, it’s important to point out that Professional Glass & Maintenance do offer a 24/7 emergency call out service. So, if you do have a cracked window and you’re worried about the security of your home or property, then please do not hesitate to contact us immediately.

However, if for whatever reason, you’re unable to arrange a repair job straight away and you’d like to seal and secure the window immediately, then have a quick read of this post before going any further.

If the window is double glazed, then the crack will inevitably lead to depressurisation, fogging, and of course, the deterioration of its structural integrity. Depending on the severity of the crack, you’re likely going to need the window replaced, which means that measurements will need to be made by a professional window repair company, and the relevant orders must be placed. So, how do you seal a cracked window in the meantime?

Sealing a cracked window

It’s important to note at this stage, that if the crack isn’t all that bad, and that there’s no real inconvenience or cause for immediate concern, then you should avoid tampering with the window and wait for your window repair specialist to assist you. Sealing a cracked window should only be done in the event that the window is beyond repair and will need replacing, but you want to secure your home while you wait for the relevant assistance.

So, first of all you’re going to need to restore the window’s tightness in an attempt to prevent the complete destruction of the glass pane itself. To do this, you can either glue it using clerical tape, or a silicone sealant. Following that, once the window has solidified, only then can you close then window. However, when closing the window, you must do so as smoothly as possible. Any sudden movements or unnecessary jolts to the window sash will almost certainly aggravate the crack, leading to the complete destruction of the glass. This is not what you want.

Once your window is closed, we would advise that you keep it closed and don’t attempt to move it again. Any steps that you can take to avoid contact with the window will be helpful, as any unnecessary interaction will only lead to more problems. If you take these precautions, you shouldn’t have any issues with the glass holding its form until your window repair specialist can come and replace the unit.


Again, these are merely temporary measures. Whilst using tape or silicone glue will certainly keep the cracked glass from breaking entirely in the meantime, it’s not a permanent fix—or at least, not if you’re concerned with the security of your property. In any case, you should call the professionals at the first chance you get and seek out their advice on what to do next. Then, they can take the necessary precautions to either repair your window (depending on the severity of the crack) or replacing it for you altogether.

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