Primer helps protect the material being treated and facilitates the repair process
It would seem, why spend extra money on it? But practice shows that walls or ceilings finished without a primer coating begin to peel after a couple of years, and wallpaper starts to come off.
It is better to choose a primer from a trusted manufacturer. It is even better to choose a primer suitable for the surface to be treated. For example, construction websites offer a special primer for wood, which can be used to treat not only wooden windows or doors, but also walls made of chipboard or MDF. For smooth or low-absorption surfaces, there is a special primer composition.
Universal primer is the most common. Its composition penetrates deeply into the surface coating and forms a film. This film prevents moisture from forming in walls or ceilings, reduces the consumption of finishing materials, and improves adhesion between them.
Leftover primer should be disposed of or stored in a dark, relatively cool place. The first sign that the primer has spoiled is a strong unpleasant odor.
Everything must be primed: ceilings, walls, surfaces of concrete and drywall. It is important to prime the surface for putty or painting with great care. Since priming is done with a roller, there is a risk of streaks and drips, which later will not be hidden and will become conspicuous. Drywall walls and those for wallpapering can be primed in one coat. In addition, there is a special type of interlayer treatment. This is done to ensure better contact between materials, no microscopic gaps, and to prevent surface damage to the materials.
It is extremely important to approach the choice of primer with full responsibility. Because otherwise, after a few years following the renovation, black mold may form under the wallpaper, and the wallpaper itself will peel off. Tiles may come off, and paint will become covered with cracks and chips. So do not skimp on primer.