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The new apprentice asks you, is it ok to paste wallpaper without brushing the basement membrane? What does this basement membrane do?
Since you are in this business, if you want to do well, you can go to Jialifeng College for training.

Brushing the basement membrane is to form a protective film on the wall to protect the wall. If the wall to be pasted with wallpaper is a standard wall (standard wall refers to: flat, dry, firm, free from dirt and color difference), the basement membrane can be brushed. If the wall has problems such as peeling, powdering and yellowing, you must brush the basement membrane.

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