Facing with ceramic plates, laying leveling masses for the floor, fixing heat-insulating materials, painting, wallpapering - this is not the whole list of construction works before which Ceresit CT 17 material is used. Why apply it? This liquid primer penetrates into the pores of an uneven surface, thereby reducing its absorbency, which subsequently makes it possible for better adhesion of the subsequent material to the base. The primer is universal and indispensable for any repair.
Operating principle
A prerequisite for facade and interior work is considered to be surface treatment with a special fluid that incorporates binding elements. This requirement is presented in order to prepare the porous surface for applying a subsequent layer. For example, if you do not apply the primer to the plaster, and immediately begin to glue the wallpaper on the finishing layer, then the adhesion area of the latter to the surface decreases. The rationale for this fact is that the adhesive partially penetrates into the highly porous layer of plaster, and the wallpaper gradually begins to recede.
When Ceresit CT 17 is applied to the walls and ceiling, the layer is sealed - its particles penetrate deeply into the material and harden. Therefore, the treated surface, in addition to strength, also acquires smoothness.
Protective functions
It is known that modern facing construction work is undesirable to carry out without the use of a primer. But why? The answer is prompted by the functions of the water-dispersed liquid:
- The use of the primer Ceresit CT 17 affects the strengthening of the treated surface, prevents its destruction and deformation.
- It reduces the absorbency of the treated layer and binds the dust.
- The tool improves adhesion (adhesion) of finishing materials with primer-soaked base.
- The primer has protective antiseptic and antibacterial properties.
- It does not reduce the vapor permeability of the surface, therefore it is used for priming screeds with heating.
- Environmental safety of the material.
Types of machined surfaces
The manufacturer stated that primer water dispersive Ceresit CT 17 is universal and can be used for application on a surface with a variety of physical properties. Indeed, the scope of the composition of this modification is impressive: the processing of internal and external surfaces before painting, ceramic cladding, plaster and so on.
But there is a list of surfaces in the technical characteristics of the dispersion composition on which the primer functions are performed according to the inherent properties:
- Plasterboard materials.
- Water-based and acrylic paints.
- Brick, concrete surfaces.
- Expanded polystyrene, polystyrene.
- Aerated concrete: gas and foam concrete.
- Wood fiber, wood chip surfaces.
- Plaster and cement-sand coatings.
For all of the above grounds, the requirements of SNiP must be met. The surface must be clean and dry before processing. Old paint, dust, lubricants should be removed beforehand. Defective areas that are on the verge of exfoliation also need liquidation, and the surface is under repair. Structural elements that do not require processing with Ceresit CT 17 are recommended to be covered with paper or film.
Consumption and specifications
By structural composition, the deep penetration primer of the Ceresit trademark is an aqueous solution of polymers. By color, it is a yellowish liquid. By smell, the primer Ceresit CT 17 should not resemble PVA glue, otherwise it is a sign of poor-quality material. The temperature at which the normal use of dispersion liquid is allowed, only positive - from 5 to 35 degrees. Therefore, it is better not to do facade work in the cold season, unless you purchase a winter version of the Cerezit primer. Priming efficiency is achieved with an air humidity of 60% and an optimum temperature of +20 degrees. The layer treated with the deep penetration composition CT 17 should be thoroughly dried, as a rule, this time is 6 hours.
The consumption for a single-layer coating, declared by the manufacturer, is 0.1-0.2 liters per 1 m 2 . However, from the physical characteristics of the treated surface, it can vary.
The composition of Ceresit CT 17 specifications has the following:
- Density, kg / dm 3 - 1.
- The smell is absent.
- Color, structure - yellowish liquid.
- Depth of penetration - depending on the surface, from 0.5 mm and more.
- Consumption per 1 m 2 - an average of 0.15 liters.
Packing, cost
ST 17 is supplied to the building materials market in polymer cans with volumes of 2.5 l and 10 l. The cost of the primer in November 2015 is an average of 300 and 550 rubles, respectively. It is more profitable to buy a dispersion liquid in a large volume. Since the Ceresit CT 17 primer has universal technical characteristics, this allows it to be used at different stages of construction and for an extensive group of surfaces, so the material can replace similar compositions with a limited spectrum of action. It results in savings both in material and in cost.
The dispersed polymer liquid is stored at room temperature for up to 12 months, which makes it possible to use a primer at various stages of construction work throughout the year.
The sequence of work when applying CT 17
- Removal of exfoliating surface sections with a brush with steel pile.
- Sealing potholes and cracks, alignment.
- Surface treatment with mold removal agents.
- Cleaning the base from grease, dust and paint.
- If it is known that Ceresit CT 17 will be applied in several layers, then the first treatment allows dilution of the primer with 1: 1 water.
- After drying, the hygroscopicity of the surface should be checked. If the composition was applied to a porous material, then, most likely, re-treatment is required.
- Rinsing the instrument with water, in case of severe contamination, removing the primer from the brush or roller can be done with a solvent.