Surface preparation for application
Before you start, you need to carefully inspect the surface which you are going to coat. Swollen and loose plaster is necessary to be removed, cracks are to be pointed and puttied. Large dents and unevenness should be plastered or puttied as well, since their presence can significantly affect the consumption of coating material and, consequently, the price of your repair. Next, using a roller or brush, apply the priming. Broad experience of working with liquid wallpaper has shown that as a primer it is necessary to use the enamel of the following types PF-115, PF-1217 VE. Only these conditions will ensure bright, unique colors and shades of the finishing material.
To avoid peeling (bloating) of the primer from the surface, it should be taken into account that the primer cannot be applied onto a dusty or easily crumbling base, whitewash or surface which is poorly washed after whitewashing. The use of PF enamels as a primer becomes necessary in case of applying a finishing material: on metal and wooden surfaces (several layers); on walls and ceilings that have been exposed to water due to water supply system failures; on the surface with whitewashing of coloured pigments; on greasy, oily and rusty sections of the walls. The use of the primer PF-115 is necessary: on the walls of old buildings, which were worked with putties on the basis of drying oil and soap. It should be taken into account that rust, wood tar, fats contained in old varnish-based putties can leave yellow streaks on the surface of the coating, and coloured pigments can change the colour gamut of the coating. After complete drying of the primer, you will have a white surface ready for further work. In rare cases, you can do without enamel paints: in case there is new cement plaster. In other cases, renunciation of covering with enamel may lead to a risk of different spots appearance on the wallpaper. In simple terms, it is necessary to create a waterproof film between the surface and the wallpaper.
After you have applied PF enamel, the surface becomes very smooth and sliding. Therefore, it is necessary to create some roughness. To do this, we paint the surface with (not necessarily expensive) water-dispersion emulsion. It should be noted that the primer of deep penetration does not guarantee a high-quality coating.
Preparing the finishing material for work
The contents of the package with a dry mixture should be poured into a plastic vessel. The capacity of the vessel should be selected from the calculation of at least 6 liters per one package of material. The mixture should be added 5,0-6,0 l of water **, mixed thoroughly with hands until a homogeneous dough-like mass is obtained. If the material is difficult to “spread out” it is necessary to add some more water. The material is ready for use. For convenience it is recommended to mix several packs of finishing material in a large container (for example, in a home bath) at once.
* Allowed technical specifications for the decorative finishing material “Excelent” are slight differences in colour shades between different batches of the same type of finishing material. If you purchased the material from different batches, when soaking, mix them with each other, this will not affect the appearance of the coating.
** The exact amount of water in the material depends on the humidity, air temperature in the room, and is determined locally and empirically. It should be taken into account that thick material is hard to apply, but too watery will drain from the vertical surface and dry longer. In this regard, it is recommended first to add water to the dry mixture at a rate of 3.5 liters per 1 package, and then by adding water the mortar should be thinned to the required consistency.
It should be considered that the prepared mortar should be used within a day, but not later than 3 days. With longer storage, it becomes unusable. Dry material in the intact factory packaging can be stored as long as desired.
ATTENTION! MATERIAL IS NOT PACKAGED WITH SPANGLES , EXCEPT FOR “MOZAIC”.
Finishing material “Excelent” can be applied in two ways: manually or by spraying. Mannually the material is applied using a grout spatula made of stainless steel or perspex, all other forms and types of spatulas are completely unsuitable for this purpose. All types of the finishing material “Excelent” can be applied manually, and it does not require special skills. The higher the qualification of the executor is, the lower the consumption of coating material gets. It is not recommended for beginners to apply the material manually on the ceilings, as these materials and fine and do not have in their composition particles regulating the coating thickness and, consequently, inexperienced masters, might face difficulty achieving perfect evenness of the material layer by applying it to the ceiling with their hands raised above head.
When applying the coating with a spatula, you can get plane walls and square corners, avoiding time-consuming, costly and dusty spackling work. This is ensured by the ability of the dough –like finishing material to fill in all potholes and cracks in the wall. However, it should be noted that the filling of large surface irregularities requires applying thicker than recommended layers of finishing material, and results in its increased consumption. One package is sufficient to cover 4.0 m2 at a coating thickness of 1.5-2.5 mm.
Material consumption required for 1 sqm has been worked through for decades, for experienced masters one pack is sufficient for a much larger area, and it doesn’t mean degrading the quality of the coating. If you got material overruns, carefully read the application mannual and follow its instructions. The second method is coating with a spray gun (do not confused with airbrush). This method is characterized by high capacity and is recommended for fast and high-quality finishing of large areas of wall and ceiling surface. However, it should be kept in mind that this method is possible for applying only those types of materials, which contain fine fillers in their composition.
Finishing materials of rough texture are only applied with a grout spatula.
By the method of spraying the coating is applied in two or three passes. This ensures evenness of decorative properties of coatings on all surface finishes. Drying of the first coating layer shouldn’t take less than 8 hours.
Note that in order to avoid the formation of visible joints and seams on the surface of the coating (such as when applied with a spatula, and by means of a compressor) it is necessary to put the material on the wall as a whole, from corner to corner without stopping on the finished parts.
1. The required solution viscosity for an even coating and good passage through the spray gun is chosen empirically, and is regulated by the addition of water. Spray application requires the production of lower-viscosity mortar than when it is applied manually.
2. The compressor should have a Teflon surface or be supplied with a reliable oil and water separator. It also should provide a minimum pressure of ~ 4 atm and capacity of ~ 120 l / min.
The higher the pressure and plant capacity are, the faster and better quality the resulting coating gets.
Drying of the coating
Drying of the coating is carried out in natural conditions, at ambient temperature. After 24-48 hours, depending on the temperature and humidity, the coating is ready to use (it is recommended to open windows for free air access).
Repair and recoating
In use almost all types of coatings are often exposed to mechanical and other types of effects, which affect their integrity and appearance. The coatings are very easy to repair. Thereto, the edge of the damaged area is moistened with water, and using a spatula the damaged area is coated with freshly made finishing material. Another possibility is to moisten a large surface of the coating and by means of a spatula the damaged area is levelled at the expense of the surrounding material. After drying, coating repair is completely invisible. The coatings applied with a spatula, should be repaired only by means of a spatula, and applied with a compressor – only by a compressor, by spraying onto the damaged area a fresh batch of material.
If a coating is intended to be removed, it is necessary to be moistened with water using a spray bottle, next given time to swell, then gently removed with a spatula. Completely removed coating can be reused. However, it should be remembered that wet material can be stored up to 3 days. After prolonged use of coverage (over 7 years) you can carry out its renovation, by moistening it and so-called grinding the coating together with a spatula, in order to avoid stains and joints this operation should be carried out on the entire wall, from corner to corner. After that, your cover will return pristine colours and freshness.
WE ARE CONFIDENT THAT WORKING WITH THE MATERIAL “Excelent” WILL FACILITATE YOUR WORK AND BRING YOU JOY.