Water-in-water colorful paint is a new type of exterior wall decorative paint, which can be used not only for energy-saving renovation of new buildings, but also for renovation and decoration of old walls. So how should the water-in-water colorful paint be applied on the old wall? Let's learn and share with you as follows:
The old wall surface is generally cement surface, paint surface, water-brushed stone surface, brick wall surface, etc. The main difficulty and key point in construction lies in the basic treatment. The quality of the basic treatment directly affects the construction effect of the water-in-water colorful paint. Decorative effect. In actual construction, different treatment schemes and construction procedures should be designed according to different substrates. The main construction steps are:
Clean the wall: If the wall is loose or bulging, it must be completely removed. If there is an old paint coating that has chalked off and is not resistant to water, use high-pressure water to wash off the old paint. Oily and dusty walls should be cleaned with detergent or lye. The cleaned wall should be cleaned with clean water to ensure that the wall is free of oil, dust and other impurities.
Problems encountered in the application of paint color paste and analysis
Repair the wall: repair the damaged part, and the repaired wall should be maintained.
Water-in-water paint construction: In order to enhance the adhesion of the coating film, the old wall construction must be painted with a sealing primer. After the sealing primer is completely dry, spray the water-in-water colorful paint.
The common coating construction methods of water-in-water colorful paint include brushing, roller coating, spraying (including airless spraying), scraping and so on.
The brushing construction surface is smooth, not easy to produce bubbles, but the efficiency is low, and it is suitable for interior wall decoration.
The roller coating construction efficiency is high, the paint film surface is easy to form a slight orange peel effect, and it is easy to foam during construction, which is more suitable for large-area construction of external walls;
Spraying is mainly used for the construction of special products, such as metallic paint, real stone paint, relief intermediate paint, etc. Spraying construction can achieve various construction effects, with low material loss and high construction efficiency.
Of course, spraying construction also has its shortcomings. For example, the process requires high technical requirements for painters and construction is easily affected by the environment. Scrape coating is a construction method for special thick-build paints, such as mortar floor paint and volumeless floor paint.
