* A primer or undercoat is a preparatory coating put on materials
before painting.
* Priming ensures better adhesion of paint to the surface.
* Primers increases the paint durability and provides additional
protection for the material being painted.
* Applying primer over new surfaces seals the original material so that
the paint doesn't soak into it,requiring extra coats.
* Primer also helps to hide joints,or seams,on new drywall,and it prevents
natural blemishes and coloring iin the bare wood.