What is bottom paint? What is the role of bottom paint?

Wed May 11 2022 JITAI

What is bottom paint? What is the function of bottom paint? Sogou ask

Bottom paint refers to a kind of paint that can be directly applied to the surface of the object as a solid foundation for the topcoat. It is the first layer of the paint system and is mainly used to improve the adhesion of the topcoat, increase the fullness of the topcoat, and provide resistance to Alkaline, anti-corrosion functions, etc., and bottom paint can ensure that the topcoat is evenly absorbed, so that the paint system can play the best effect. According to the painting requirements, bottom paint can be divided into first bottom paint, second bottom paint and so on. Some people say that the bottom paint can be used without the bottom paint if the quality of the top paint is good, because the functions of the top paint and bottom paint are different. The top paint focuses on the final decorative effect, while the bottom paint focuses on improving the attachment Focus, anti-corrosion function, anti-alkali and other effects.
1. Features of bottom paint
1. The bottom paint has strong adhesion and strong penetration ability.
2. The bottom paint has strong alkali resistance and prevents the wall from returning to alkali and powdering.
3. The bottom paint has strong water resistance, so that the wall can be kept dry at any time.
4. Bottom paint can effectively prevent mildew and algae, and has excellent performance.
5. Bottom paint can save topcoat and enhance the adhesion of topcoat.
2. Types of bottom paint
Commonly used bottom paint types are: iron red cathode electrophoresis bottom paint, new metal anti-corrosion bottom paint, phosphating bottom paint, amino alkyd two-layer bottom paint, new wood closed bottom paint, new metal bottom paint, new zinc-rich bottom paint, Iron red alkyd bottom paint, rubber alkyd bottom paint, zinc yellow polyurethane bottom paint, acrylic/epoxy bottom paint, new polyphenol oxide pre-coat bottom paint, epoxy resin bottom paint, new asphalt ship bottom paint.
3. The role of bottom paint:
One: closed
Some walls have strong alkalinity. After being soaked in moisture and water, alkali flowers will be formed. The scientific name is also called pan-alkali. This situation will cause crater-like protrusions on the surface of the paint film, and in severe cases, a layer of alkali frost will be formed. Eventually the paint film is destroyed. But if bottom paint is done, this situation can be alleviated and the wall can be closed. If the wall is high and dry, it may not be a problem without bottom paint, but it is best to paint bottom paint for the sake of safety.
Two: Adhesion
The latex content in the bottom paint is relatively high, the adhesion is relatively strong, and the penetration force is good. After using the bottom paint, it can effectively improve the bonding force between the latex paint film and the wall. At the same time, the good adhesion of bottom paint can make the wall more smooth, and it is also more conducive to the brushing of topcoat, reducing the amount of topcoat used.
Three: fill in
If the wall in the home is not strong in alkalinity and is relatively flat, then bottom paint can be omitted. Of course, the effect of bottom paint will be better. Applying a layer of sealed bottom paint before painting the topcoat can not only save the cost of decoration, but from the perspective of long-term decorative effect, painting the bottom paint has the advantage of getting twice the result with half the effort. Brushing bottom paint can make the wall smoother, avoid paint disease on the wall, and help to maintain the painting effect for a longer time, why not do it.
Fourth, bottom paint purchase instructions
When purchasing bottom paint, it is best to choose the same brand or matching paint as the top paint to prevent chemical reaction between the bottom paint and the top paint, which will affect the painting effect of the wall. When purchasing bottom paint, carefully read the type or model of the matching topcoat indicated in the outer packaging instructions, if it is not the matching paint

What is bottom paint? What is the role of bottom paint?