Paint primer is a preparatory undercoat put on materials such as wood, furniture, or walls before painting. Primer is a lot like paint but has a higher concentration of solids plus an adhesive binder in it. In some ways, it is more like glue or a sealant than paint. It seals the surface you are working with and provides a clean and smooth area for the paint to stick to. But since not all jobs or projects need primer, it is helpful to know which factors contribute to using it or not.
Picture yourself trying to brush a pale lavender paint over a dark green shade and you will realize very quickly that priming over the dark color is necessary when making a dark to light transition. In some instances, when covering a dark coat of paint, you may need a tinted primer to help the new color look truer to the color swatch you have chosen. Scuffed or stained walls can greatly benefit from a coat or two of priming before painting. Some stains, such as crayon scribbles or grease spots, will show through new paint.
Surface blemishes may also easily show through a lighter shade of paint so it is worth your time to use a primer if your walls have a few things to hide.
Do not, however, use a primer to cover up mold or mildew on your walls. It will only grow. First, deal with the cause of the mold and remove it. Then you are free to go ahead to prime and paint. Cigarette smoke and other strong odors can still be left lingering after repainting. Special primers can be used to truly cover the unwanted smells and block them permanently. It is always a smart idea to prime before you paint a porous surface such as unstained or untreated wood.
The surface is porous when it absorbs water, moisture, oil, odors, or stains. Newly installed drywall is highly porous as well but in two ways: the bare facing paper on drywall and the dried joint compound covering the seams. Also, if you have patched or repaired drywall, you will likely have patches of spackle or joint compound on the surface.
If these patches are small, there is no need to buy separate primer. Note: do not use a primer to hide mold or mildew in your walls. It will only grow. Instead, first, deal with the cause of the mold usually water entry , and remove the mold. Then, you are free to prime and paint. Many professional painters use a tinted primer before painting. This is an inexpensive way to bring your walls close to their final intended color before adding the more pricey topcoat.
Ask about this at your paint store if you are painting a bold or dark color. Stucco is an incredibly durable, versatile product, and it has been a popular building material from Los Angeles to New York to How to Paint a Room Many people look at their dull or scuffed-up walls and wonder what it would be like to have freshly painted, Patched Or Repaired Drywall If you have repaired a wall before painting , you will likely have patches of spackle or joint compound on the surface.
So the paint manufacturers have developed new, faster-drying technology in both oil and latex-based products that dry quickly yet still aid in the proper adhesion of your paint topcoat.
Some masonry surfaces can have a high pH level which will cause adhesion problems if you apply paint directly to the surface. A quality masonry primer will allow you to safely paint over a wider range of pH levels without risk of adhesion loss. Another problem is called efflorescence; which are unsightly white, crystalline deposits that can form on any masonry surface.
Many masonry primers are efflorescent-resistant and do a great job of keeping it from becoming a problem. Some examples would be factory coated metal sidings, ceramic tile, glazed block, plastic and vinyl shutters , and surfaces with a high gloss finish. If you choose the correct bonding primer for your application you will be far more likely to get great adhesion of your finish coat to the surface.
We would advise people to not think of these products as something that will save you a coat of primer, but instead think of them as an opportunity to use an additional coat of the same material instead of switching products between the base coat and the finish coats.
On new drywall, you will use 3 coats of the finish material instead of a primer coat plus 2 coats of finish.
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