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Are you planning to refinish some patio furniture with leftover paint from the living room or basement, or to repaint an exterior wall or door?
Is it possible to use interior paint outside?
Although the short answer is yes, it’s not recommended. Interior paint is not meant to withstand rain, snow, wind, or exposure to ultraviolet, mold, or high temperatures. It contains fewer pigments and binding resins than outdoor paints and has a porous finish. As a consequence, the paint will fade quicker, dust or chalk, crack, and flake. This article will look at interior paint, and why it is best used indoors. We’ll also go over what you should do if you happen to use it outside anyways.
What Exactly Is Interior Paint?
Interior paints are designed specifically to use indoors. They are made to stick to various surfaces, reflect or absorb light, and withstand the abrasion and wear of daily contact and cleaning. They also do not normally have to withstand the expansion and contraction of the freeze-thaw cycle, as well as exposure to harsher natural elements.
Can Interior Paint Be Used Outside? Why it is not Recommended?
There are numerous reasons why you might want to use interior paint outside. Some of the reasons I’ve heard are that it’s less expensive, you want to use up leftover paint, or you like the color. However, while interior paint can be used outside, it should not be. Interior paints are made differently than exterior paints. They are not designed to withstand freeze-thaw, rain, snow, mold, and mildew and will chalk, fade, and break down faster. Interior paints are more porous, lack the resin needed to bond to exterior surfaces, and are more prone to cracking and flaking. If you insist on using interior paint outside, seal it with one or two coats of exterior-grade clear-coat sealer.
It may extend the length of time it will adhere depending on the amount of exposure to the elements, but it will not necessarily prevent it from fading, and the sealer may turn yellowish. Using interior paint with a sealer increases the amount of work and reduces the finish of more costly exterior paints. Furthermore, using interior paint outside voids its warranty. Because the surface is protected from the elements, painting the inside surface of a front door with interior-grade paint is acceptable. The surface must be properly prepared, particularly if it is a metal door. If the door is protected by a storm or glass door, you can use the same paint on the outside; otherwise, it will fade, crack, and chip. Filling cracks, using TSP to clean the surface, a sealer, a masonry primer, and several coats of paint are all necessary before using interior paint on interior concrete walls or slabs.
Using interior paint on exterior concrete, on the other hand, necessitates an additional coat or two of quality exterior sealer over the interior paint. Interior paints will still fade and wear faster than exterior paints due to exposure to the sun and other elements. Some people are unsure whether interior paint can be used as an exterior primer. You can use it as a primer for a variety of reasons, including cost reduction. It will need to be lightly sanded to improve adhesion before being covered with quality exterior paint of the same base. Unfortunately, depending on the adhesive qualities and the extremes of your climate, you may still need to repaint the surface in a year or two. Modern interior grade paints are formulated for interior use, not outside.
3 Reasons Why It's a Bad Idea to Use Interior Paint Outside
Conclusion:
I hope this article has helped you understand why using interior paint outside is not such a great idea. Anyways, it’s best to let a professional paint your house, as this work requires years of practice and expertise. If you are looking for a professional interior/exterior painting service in Charleston SC. We at Blue Nile Home should be your first choice. Our team of experts knows the ins and outs of the work and are: Professionally trained, respectful, punctual, and respect deadlines.
Contact Blue Nile Today at (843) 310-1074.
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