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Filling cement slurry or using foaming agent is OK, pouring cement is a little troublesome, foaming agent is easier, and the door saw must draw a line, how can it be straight if you don't draw.
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I offer ah security door door frame filling.
The hole on the anti-theft door frame is filled with cement slurry, and many people fill it.
The strength of cement pouring is large, and the foaming agent is trouble-free.
With two wooden squares are the same length as the width of the door, used to resist the door on both sides, and then pour cement, after pouring cement, the excess cement at the keyhole can be removed to lock the door, but the wooden square should be held until the second or three days before it is removed, the wood is generally supported under a branch, and a branch is at one meter, but it is not very convenient to enter and exit in the past two days, and we install a new steel door like this.
This depends on the degree of stirring, and generally it should not be too thin.
You're definitely talking about polyurethane caulk, that thing is only used for caulking, fixing air is a strong point, fixing the door is not good. Or do you have to fix it with something special.