Repair mortar, white resin-based joint filler for plasterboard and joint compound. Suitable for interior use, based on gypsum reinforced with methylcellulose. It creates smooth surfaces ideal for wallpaper application or painting. Especially suitable for filling cracks and holes in plasters and masonry, skimming plasterboard, as well as for crafting. Mixes easily without lumps. Offers high stability, excellent coverage, and adhesion. It does not shrink, crack, or blister.