Home renovation needs to use paint coatings, go to the building materials store to buy and found that now many of the wall paint will be divided into primer and topcoat. The primer is used on a layer that is in contact with the wall, and the topcoat is a layer on the surface. You may know this simple distinction, but the difference between the primer and the topcoat price is not small. Where is the difference between the primer and the topcoat ? The following Bai Rui furniture Xiao Bian will take you to understand.
What is a primer
Primers are usually white in color and have a certain viscosity. According to the level of its concentration can be divided into high viscosity primer, general primer and thinner primer. According to their different roles, they can be divided into ordinary primers, anti-yellowing primers and barrier primers. High-viscosity primer: refers to the primer viscosity is higher, the concentration of the available viscosity cup and stopwatch measurements, the higher the second the higher the concentration. General viscosity primer: The viscosity is between 15′′-25′′, the most widely used primer, which can be formulated with a high viscosity primer. Viscosity thinner primer: also known as sealer primer, that we say Wash Coat, its concentration is relatively dilute, the solid content is between 4% and 14%, and the primer is diluted by a certain proportion. Covering Primer: This is the edge paint we talked about. It completely covers the color or wood grain that can semi-close the wood.
The role of primer: Primer can effectively seal the base layer, so that the wall base is more solid. Some of the walls are more basic and produce alkali after soaking with moisture and water. The scientific name is “alkaline.†This condition causes craters to form on the surface of the paint film. In severe cases, a layer of alkali cream forms on the surface of the paint film. Ultimately the paint film is destroyed. The primer can act as a seal to ease this condition. However, if the walls are relatively dry and the floors are high, there is no possibility of problems. The primer can enhance the adhesion of the topcoat and improve the adhesion of the latex paint film to the wall to avoid peeling off of the wall. The primer can make up for fine cracks and improve the flatness of the wall. If the wall is relatively flat, you can use no primer, and of course the effect will be better. The price of the primer is generally cheaper than the top coat, so applying the primer before applying the top coat can save the decoration cost.
What is topcoat
Topcoats are usually clear, transparent, and somewhat bright liquids. In the entire coating process used for the last 1-2 times the coating, that is, the outer coating of wood products and the external coating used in the coating, is almost the final decision the entire product appearance (color, gloss, visual sense, feel, etc. ) The material of the image, the top coat has a series of perfect decorative protection properties, such as transparent varnish, smooth feel, hard wear, heat resistance, water resistance, chemical resistance, easy construction and so on.
The role of finish: scratch resistance, hardness, gloss, feel, transparency, aging resistance, yellowing resistance, etc. are mainly reflected from the topcoat, the quality of the topcoat directly affects the quality of the entire film.
The difference between topcoat and primer
1, different composition:
The primer is composed of four parts: resin, filler, solvent and auxiliary agent; the difference between the top coat component and the primer is mainly that the filler of the former is added little or no.
2, play a different role:
Primer is the first layer of the paint system, used to fill the paint surface, support the topcoat, provide fullness, reduce costs, and help save energy; finish coating is the final coating of the coating, and is the final in the decoration of the building wall. Apply a layer to increase the thickness of the paint film by increasing the number of coats of the top coat and by applying a thick top coat. The thickness of the coating is mainly provided by the primer, while the topcoat is mainly used for decoration and protection.
Through the above introduction in detail, you should know about the difference between primer and topcoat . When purchasing, you will be distinguished. For more information about paint, please pay attention to GO Home Information Channel.
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