Knowing when to apply primer on the walls before painting and when not to, will help you do a professional job saving time and money. When using primer, make sure it is appropriate for the job in question.

Adhesive primer
This painting creates an adhesive bond between a hard, slick surface and the final coat of paint. This is usually pigmented oil paint or shellac. Use one when you paint with latex adhesive base or oil high gloss or when you do on vinyl or wood panels painting. No need to use adhesive primer when using any gloss latex on latex paint bright ; however, you should apply two coats of final paint if the luster is different from the existing one.

walls before painting

Primer to cover stains
Some paints are used to eliminate the transfer of damage caused by water-based stains and tannin in cedar or redwood. They often have the same properties as paints based stains cover. A good example is based paint pigmented shellac Original Kilz (see Resources). These paintings are also effective basis for sealing spots of colored pencils, markers and many smoke and odors. For example, a primer to cover stains seal the bleaching and the smell of smoke rooms which have been occupied by smokers.

 
Primer for drywall
The primer for drywall creates a uniform absorbing surface for the final coat of paint and should always be used as a first coat new drywall or large patches. Economical, good coverage (which means that you can hide the gray or green panels are below) and prepares the surface for long-lasting washable finish.

Tinted primer
Some of these paintings reduce the number of coats to be applied to get a good red and other dark tones. Ask an employee of the paint store when to use a tinted primer. Dependent on the base and in particular dyes. Based paints are usually dyed gray.

Misconceptions
Indicates a misconception that dark walls require primer before being painted with light colors. Most white , gray, beige and raw require only two coats of paint on a dark surface. Even if you use a primer, it is likely that you should apply the same amount of final layers. If you really need to use white base paint to cover a dark surface, avoid those made ​​for multiple uses as they are usually very dilute. Ask at the store for a primer of great coverage.

The expert opinion
Every time you change the gloss paint for walls, like satin to semi-gloss to matte or eggshell should apply two coats to get a uniform luster. Because most based paints have a matte finish, apply two coats of final paint (unless you search for a matte finish) You should never apply more than one coat of primer.