Our wall repair paste contains calcium carbonate and calcium oxide. It can repair wall cracks and provide a protective layer on the wall, suitable for rental property renovations, removing wall stains, graffiti, scratches, dirt, cracks, and more. Its usage is very simple: clean off any peeling parts of the wall with a scraper to ensure the surface is clean and dry, then evenly apply the wall repair paste to the damaged area using a spatula/scraper (if the thickness exceeds 2mm, it needs to be applied in layers). After the wall repair layer has dried (no less than 2 hours), sand the surface, remove the dust, and then evenly apply wall paint with a roller or brush. After 2 hours, apply a second coat to complete the repair. It can quickly and effectively repair wall cracks, restore the wall to like-new condition, is composed of safe ingredients, and provides long-lasting results.