Surface preparation

To carry out any activity in the finishing phase of a building, including tiling, repairing cracks, painting, sealing, etc., it is necessary to first thoroughly clean and prepare the desired surface. Surface preparation has several stages, and if it is not done properly, sufficient adhesion between the surface and the new layer will not be established and the applied materials will not be durable enough. Part of the surface preparation stages is related to physical work such as cleaning, but sometimes it is necessary to apply certain chemicals to the surface before carrying out the main work. What does surface preparation include? In the first step of surface preparation, we must first clean the desired area of ​​any contamination such as grease, soot, dust, mold, dandruff, scale, etc. Depending on the amount and type of contamination, the surface can be cleaned with the help of water, steam, abrasives, or a chemical solvent. In activities such as metalworking, painting, etc., chemicals are needed to prepare the surface. For this purpose, acids or phosphate solutions are used to chemically modify the surface, remove oxides, or increase adhesion. Surface priming is also one of the surface preparation steps for a specific group of construction works in which a primer or bonding agent is applied to the clean surface to increase the adhesion of the substrate and subsequent coatings. At each stage of surface preparation, if we want to leave part of it untouched, we can use films or covering tapes. In the end, it is important that the surface is completely dry and ready for joinery operations. Introduction to Sahand Shimi Construction Primer Sahand Shimi Construction Primer is a product that is used to prepare plaster, cement, concrete, AAC block, ceramic, and stone surfaces. This product increases the adhesion of cement-based compounds to the surface under the work and reduces permeability by closing capillary pores. On the other hand, reducing the water absorption of the surface leads to a reduction in the consumption of applied materials, which in turn will save costs. Primer increases the adhesion strength and ultimately the quality and longevity of the tiling. It is essential to use a primer on surfaces with high water absorption, such as gypsum surfaces. This is because gypsum absorbs the water in the tile adhesive, making the adhesive hollow and brittle. However, the presence of a primer layer prevents water from escaping and being absorbed by the gypsum surface, giving the tile adhesive (or sealant) the opportunity to reach its final strength.