What is the importance of primer in painting? A primer (/ˈpraɪmər/) or undercoat is a preparatory coating put on materials before painting. Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.
What happens if you don’t use primer before painting? If you skip priming, you risk peeling paint, especially in humid conditions. Moreover, the lack of adhesion could make cleaning more difficult months after the paint has dried. You may find the paint wearing off as you’re trying to wipe off dirt or fingerprints.
What is primer and undercoat paint? 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.
What’s the difference between undercoat and normal paint? Primers are used on bare surfaces (e.g. wood and metal) and are usually white or off-white, sealers are used on plaster or masonry and are normally clear or only lightly pigmented, and undercoats (sometimes called mid-coats) are used onto coated (primed or painted) surfaces and are always pigmented.