Putty, as a process, is a mandatory step in wall decoration. Putty, as a material, is designed to align the walls and prepare them for the further stage: painting or pasting with wallpaper.
Distinguish between starting and finish putty. Starting is designed for primary alignment of surfaces after plastering work. The finished putty is used to finally remove minor defects and scratches and is mainly used to prepare surfaces for painting.
The main binder for starting putty is used cement or gypsum. Cement in its cost are cheaper and used for external work and for decoration of premises with high humidity. The main disadvantage is the long screening time and the subsequent surface processing will have to be carried out no earlier than two days.
Gypsum are more expensive, but quickly grasp and easily processed. The disadvantage is directly opposite. It is impossible to immediately prepare a large amount of putty. You have to make small portions, since the grasp starts from 20 minutes to half an hour from the moment the solution is prepared.
Typically, starting putty goes on sale in the form of dry mixtures. They must be prepared in accordance with the instructions. She is on every package.
It makes no sense to recommend any specific variety or manufacturer. Each type of putty is designed for a certain type of finishing work. Sometimes you will have to purchase imported putty of high cost, and in another you can do the domestic, cheapest.
The most important thing is to properly prepare the surface. Clean it from the exfoliating coating, if there is an open metal, then treat it with a rust converter. Even if there are no rust, then a phosphate film is formed, which will not allow corrosion to develop. And be sure to treat with a primer. Then get a guarantee that putty will not exfoliate.
After applying and grasping putty, it is cleaned with an abrasive net. It does not make sense to use sandpaper, since it will instantly clog.
After stripping, remove dust and go through a primer again. This not only prepares the surface, but also additionally connects the first layer.
Now the turn for the finish putty. Previously, it was produced only in the form of dry mixtures. Now you can purchase a finished on a latex or acrylic basis. With its help, all the smallest defects are aligned. She is very plastic and masters say that you can apply a layer of 0.1 mm. For internal work, you can recommend a latex, for external – acrylic.
For finishing, you need to be very careful about the quality of the tool. The edges of the spatula should not have jams and potholes. Otherwise it will have to be polished a lot of time.
Grinding is performed with sandpaper with water -resistant paper of small grain with water.