why do we use primer before painting
essary in every painting project. To know when you should use a primer you first have to understand what types of primers are available and what they're intended to be used for. The best way to understand their intended uses is to first look at them by primer categories. Drywall Primer New/bare drywall soaks up paint like a sponge and causes it to cover better in some areas than others; especially when youБre comparing drywall mud joints to the surrounding areas. To help achieve a consistent appearance with your final coat it is always a good idea to first use a primer Б and besides, using a quality drywall primer is typically much less expensive per gallon than using multiple coats of a quality interior latex paint. Wood Primer Bare wood is among the more difficult substrates for a paint topcoat to adhere to. In the past, there was no substitute for a good slow-drying oil-based primer on bare wood. It takes a long time to dry, allowing plenty of time for it to soak into the wood, and it sticks better than any other type of primer to wood. Even though old fashioned oil primer is still the best for this use, nobody likes to wait 24 hours for a primer to dry before they can topcoat it. 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. Masonry Primer There are several reasons why it is a good idea to apply a masonry primer before paint. 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. Stain-Blocking Primer There are different types of stain-blocking primers for specific uses, but some of the more common situations where their use is necessary are: keeping water and smoke stains/damage from bleeding through the finish coat; painting over top of crayon, marker, or grease; and making a dramatic color change Б especially when painting a lighter color over a much darker color. Bonding Primer Some surfaces are especially БslickБ and pose a unique challenge for even the best primers when trying to get a coating to stick to them. Some examples would be ceramic tile, glazed block, and surfaces with a high gloss finish. If you choose the correct bonding primer for your application you will be sure to get great adhesion of your finish coat to the surface. There are a couple of exceptions to these categories: Multi-Purpose Primers have become very popular because of their universal application for a wide-variety of uses. A word of caution Б some manufacturers have a tendency to oversell these products for situations that they are not necessarily a good fit for. Before you grab a multi-purpose primer off of the shelf make sure that it specifically states on the label that it can be used for your intended purpose. When buying a multi-purpose primer go with a proven name brand such as, or products. Paint Primer In One products are one of the newest and most-popular trends in the industry.
What a great idea! Who wouldnБt want to make their painting project easier by using a product that primes while it paints? While this concept is wonderful in theory, it has limited applications when it comes to actually holding up well to the test of time. Again, a good rule of thumb is to stick to the highest-quality manufacturers if you decide to use one of these products, and make sure you check the label to ensure it can be used for your intended application. by Sherwin-Williams. Most projects where youБre going over a previously-painted surface do not require the use of a primer. In many cases all youБll need to do is spot-prime any bare areas that need to be addressed before applying your finish. If youБre coating over any surfaces that have never been painted before, just follow the guide above to find the proper category of primer for your project and you canБt go wrong. If you're in the Greater Pittsburgh Area and you need help with your priming and painting project please contact us for a free consultation and quote! Because primer is important! Despite all of the hype surroundingPPaint and Primer in One products, there are many situations where a coat of primer on its own is crucial to properly preparing a surface (interior or exterior! ) for a paint job. PWhilePPaint and Primer in One products are often an excellent choice for previously painted interior surfaces that are in good condition, we find that most other situations, especially on exterior projects, require a separate coat of primer. Primer creates a layer that paint can better adhere to.
PWhile applying primer may seem like anPextra step, you may find that it actually saves you time and money, since primer tends to be less expensive than paint and by using it, you are saving yourself from buying that extra paint. PIn this blog, we have compiled a list of scenarios where primer is most helpful. New Drywall New drywall isPextremelyPabsorbent. PIt tends to soak the paint up like a sponge, causing you to use more paint than necessary. PWorse still, the paint often lays down unevenly when it comes to bare drywall, causingPflashing, or an uneven appearance in sheen. PThe primer helps to seal this porousPsurface and create a smoother substrate, improving the overall appearance and longevity of the paint. Raw Wood Unfinished wood should always be primed priorPto painting. Primer, having high-solids content, helps fill in the wood grain and creates a smooth surface for the finish coat. P Like the raw drywall, unfinished woods tend to really soak up paint, and primer helps seal the surface to prevent this from happening. Either latex primer or oil-based primer is suitable for raw wood, depending on the type of paint you will use. However, keep in mind that for wood such as cedar or redwood, oil-based primer is actually necessary as it penetrates deeper into the wood, helping to prevent tannin stains. Stains Stains from smoke, fire, pets, water damage, etc. can be extremely difficult to get rid of. PThey can bleed through your new coat of paint, even if you used primer beforehand! PThe key here is to use a special primer designed to block stains and even odors. POur favorite product at Sound Painting Solutions is Zinssers Shellac-based primer.
Color Changes For significant color changes, a primer is absolutely necessary forPyou to achieve your desired result in a reasonable amount of time. P If you have ever tried to change the color of the wall from a darker colorPto a lighter one, you may have noticed that the dark color continues to show through even after multiple coats. Primer helps hide the darker color before you begin applying the lighter paint. P Conversely, if you are painting a darker color over a lighter color, you may notice the darker paint goes on too sheer, even after multiple coats. Primer, of course, is helpful in this situation as well. A little-known tip is that you can ask the paint store to tint your primer to a color close to your paint, helping you achieve a darker color in less coats! We tend to have our primer tinted at 50% of the desired color, whenever needed. Finally, remember to always prepare your substrates and surrounding area even before applying the primer. PThis includes patching any holes and cracks withPspackle, sanding any patched areas or loose paint, thoroughly cleaning any dirt or grease on the walls, and protecting surrounding areas (like plants and furniture) with plastic, masking and/or drop-cloths. Any thoughts on the usefulness of primer? Any DIYers have their own experiences to share? Please leave us a comment below! For all of your Seattle painting needs, consider hiring a professional, quality-oriented painter who takesP all of the necessary steps to prepare your surfaces for a long-lasting paint job. Call Sound Painting Solutions today at (253) 642-7041, or simply fill out our contact form in the right sidebar.
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