What should I do if the double-layer insulating glass of plastic steel window leaks?

Treatment of air leakage of double-layer insulating glass in plastic steel window:

After the gap between the wall and the window is filled with foaming agent, the gap between the window and the wall must be sealed with waterproof sealant, provided that the gap is not too big. If the gap is too big, it must be filled with waterproof mortar first. After the doors and windows are installed and fixed, foaming agent should be filled in the windows. After curing, they should be cut flat. Finally, the outer frame should be sealed on both sides.

If the crack is not big, just fill it with sealant. If the cracks are large, they should be filled first, and then sealant should be used.