Difference between primer and paint

Primer and paint are formulations applied to the surface of objects. Each of these materials has its own purpose. Let's consider how the primer differs from the paint and whether it is possible to replace them with each other when performing work.


Primer - a compound used to create high-quality adhesion between different materials.


Paint - a composition with which a colored decorative coating is created on the surface of objects.




Let us dwell in more detail on the purposes of using each of the compositions, because it is in this - the key difference between a primer and a paint. So, the primer is necessarily used in cases where it is necessary to cover a fragile surface with any material. For example, it is necessary to prime the plastered wall before gluing the wallpaper. The composition will bind the fractions of the plaster and make it much stronger.

In addition to strengthening the surface, the primer provides a tighter bond with the subsequently applied material. For example, paint or tiles on a substrate prepared in this way will hold up much better and will last for many years. And if a layer of primer is applied to the metal, then this also provides protection against corrosion.

What is the purpose of the paint? First of all, this is the creation of the decorative effect that we observe when looking at the painted surface. But the functions of paint do not end there. The polymer coating formed by the composition has a number of properties. It protects the base from adverse influences, prevents rotting or corrosion of the material, and provides fire protection.


The primer contains few pigments. At the same time, this substance contains special components that allow it to perfectly “stick” to different bases. In this case, a rough surface is formed, with which other material adheres very tightly.

Pigments are an essential part of paint. The type of pigment determines the color of the coating and its resistance to various factors. Also, the paint contains binders, which act as film-formers, and solvents, which make the paint less viscous and more convenient for application.

Many people wonder what is the difference between primer and paint, hoping to save money. After all, covering the surface with two coats of primer would be cheaper than applying paint on the primer. Experts advise against replacing one composition with another. Only "in a bundle" do they form an integral system, where each component performs a specific task: the primer provides impregnation and adhesion, the paint provides a film, gloss and guarantees color stability.