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What Is the Difference Between Primer and Undercoat

Coatings are painters core business. Depending on the end use and specifications, one can choose from among the following categories of products.

The difference between primer and undercoat are as follows

Primer is the precoat or the first coat which is applied on the surface of the where the painting is to be done. While the undercoat is the second coat which is applied over or the application of primer.

The primer works to hide the stains and helps to prevent the discolouration.

Primer is very necessary and important to use when we have to change the colour from dark to the light one.

Primer is used to seal and protect their surfaces such as plaster and wood. The undercoat is used on the surface which is already painted. The undercoat is the second coat which is provided on the surface before the application of the final coat.

Undercoat paint is a subset of the primer. The Thumb Rule which is generally used is that if the surface is new then we have to use a primer to paint that surface.

If the painting has to be done on the old surface which is already painted then apply the undercoat on that surface.

The primer cannot be used as the last coat on the surface, but the undercoat can be used as the last coat on the surface of the wall.Rongpeng R500 Lvlp spray gun with aluminum gun body,excellent atomization,main use for automotive primer, undercoat and surface painting.