Hello-

I hope I understand the text, meaning an abandoned building that has had its windows and doors 'sealed up' with either cement or bricks?
If so, I found several valid references, depending on the material.
Example: 'cemented', 'cemented-up', 'cinder-blocked', 'boarded-up', etc.
But in general, it seems the most common expression used is 'to seal-up a window with cement blocks'. So I reduced to 'sealing up', so as not to confuse with 'window sealing' with silicone.

Not a pretty term , though, I realize. I'll keep looking....