Are you planning to usage some leftover paint from the life room or basement on some patio furniture, or to repaint one exterior wall or door? Wondering can you use internal paint outside? back the quick answer is yes, it’s no recommended.

You are watching: Can you use interior paint outdoors

Interior paint isn’t draft to resist rain, snow, wind, UV, mildew, or temperature extremes. It has less pigment and binding resins than out paints, and the finish is as well porous .As a result, the repaint will fade, flour or chalk, crack and also flake much more quickly.

In this article, we’ll take a look at internal paint, what it is made of, and why that is best suited for usage indoors. We’ll also discuss what to execute if you perform use that outside. By the end of the article, girlfriend should have actually a much better understanding that what internal paint is and also why the is far better suited because that indoor use.
Quick Navigation


What Is interior Paint?

Interior paints are specially formulated to be offered indoors. They are designed come adhere to various surfaces, reflect or absorb light, and withstand abrasion and wear of day-to-day contact and cleaning. They also don’t generally have to stand up to the expansion and contraction the the freeze-thaw bike or exposure come the harsher aspects of nature.

Paints are comprised of four parts – the base or liquid, additives, pigments, and also binders. The binders, pigments, and additives are what make inner paint various for exterior paint, and why they are not interchangeable. Interior paints space designed to have actually lower volatile organic compounds (VOCs) to minimize health risks due to off-gassing. The VOCs space the solvent the helps store the liquid from hardening; lock vaporize together the paint dries.


Interior paints have the right to be water-based, which contains latex and acrylic paints, or oil-based such together alkyd paints. Water and oil-bases offer various adhesive properties and also use. Both are accessible in various sheens from high-gloss, semi-gloss, to flat. If you’re unsure if miscellaneous is painted with an oil or water-based paint, wipe it through a fabric dipped in denatured alcohol. If the doesn’t choose up any type of color, it’s likely oil-based; if that does, that water-based.

You can paint over oil-based through water-based or latex paints after applying an oil-based primer or stain lock sealer. Oil-based paints have the right to be offered over water-based paints as soon as they room dry – you may need to scuff glossy surfaces gently through sandpaper.

Water-Based Paints

Water-based or latex paints consists pigments and also binders mixed in water together the carrier. Castle dry much more quickly as the water evaporates, leave the shade behind. Latex painted surface are easier to clean and hold their color far better than oil-based alternatives. The paint usually has actually less VOCs, so the is more environmentally friendly than oil-based paints.

When dry, internal latex paints administer a flexible and also durable paint and are right for painting ceilings and also walls. Many prefer water-based paints for the ease of clean brushes, tools, and also spills by making use of soap and also water.

Oil-Based Paints

Oil-based paints contain organic oils favor linseed, Tung, or soybean, or artificial alkyds. They contain pigment, oil resin binder, and also a solvent thinner. Once spread top top a surface, the diluent evaporates, leave the resin and also pigment to type a durable, long-lasting tough coat.

Oil-based paints frequently produce more VOCs, for this reason they are much less environmentally friendly, and also surfaces room more difficult to clean. Oil-based paints work-related well top top doors, trim and also baseboards that require a an ext durable paint than most walls due to contact with vacuums, furniture, and also grubby hands.

The paints take much longer to dry however create a tough, durable, hard film. Cleanup is more an overwhelming and requires paint thinners, turpentine, or mineral spirits to clean brushes, tools, and also spills.

Liquids or Solvents and Additives or Fillers

Water in latex paints and mineral spirits in oil-based paints carry and also spread the colours color and binders onto surfaces, and also then evaporate. Paints have various additives depending on their use.

Fillers, such together clay, talc, lime, or barite, help thicken the paint film.Bonding additives improve the ‘sticking’ ability of paints to different surfaces.Enamel is included to paints to do them harder, much more durable, and also less porous once dry.Conditioners or anti-microbial additives improve the flow and also reduce brush drag, stand up to mildew, and also improve the leveling ability of the paint.Texture additives favor fine sand to make stair runners much less slippery.Glitter to boost reflective properties.Scents space also included to make the repaint smell better.


Pigments provide the color for paint and may be organic or inorganic. The form of pigment can likewise determine how resilient the shade is, which effects how often the walls may need sprucing up or repainting. Essential pigments are either vegetable or animal in origin and also are naturally transparent.

They traditionally aren’t together long-lasting as not natural pigments, but contemporary chemistry is changing that. Not natural pigments room solid mineral colors that occur naturally but are modification for repaint manufacture.

Inorganic pigments space long-lasting and also have been uncovered on 30,000-year-old cavern paintings. Every white pigments come from inorganic sources, with titanium dioxide gift the most common. Essential pigments mix, blend, and disperse in the base and also have much better transparency 보다 the carefully ground not natural particles which space mixed and also suspended in the base. A greater inorganic fragment count creates more solid content, which outcomes in deep wealthy colors.


Binders organize the pigment together to create a resilient film on a surface. The plastic-like polymers provide much better adhesion to different surfaces, and also resistance to abrasion, and also household cleaners. In latex paint, binders have to be 100% acrylic, not a blend. Oil paints generally contain drying oils such as tung, linseed, or modification oils.

Can you Use interior Paint Outside?

There are countless reasons for wanting come use internal paint outside. It might be much less expensive, you want to use up extra paint, or you choose the color, are simply some factors I’ve heard. However, while you have the right to use interior paint outside, friend shouldn’t.

Interior paints have actually a different formulation 보다 exterior paints. They no designed because that freeze-thaw, rain, snow, mold, and also mildew, and will chalk, fade, and failure more quickly. Inner paints are much more porous, absence the essential resin to tie them come exterior surfaces, and also are more likely to crack and flake.

If friend are determined to use inner paint outside, it have to be sealed v one or 2 coats that exterior-grade, clear-coat sealer. Relying on the quantity of exposure come the elements, it may extend the size of time it will adhere, however it won’t necessarily stop it native fading, and also the sealer may yellow.

Using inner paint through a sealer rises the quantity of work, and makes more expensive exterior paints a cheaper finish. Additionally, using interior paint outdoors voids that is warranty.

Painting the inside surface ar of a front door with inner grade repaint is fine due to the fact that the surface is protected from the elements. The surface ar will need to be effectively prepared, particularly if that a metal door. You have the right to use the same paint on the exterior of the door if that is protected with a storm or glass door; otherwise, it might fade, crack, and chip.

Using interior paint on interior concrete wall surfaces or slabs is possible with a most prep job-related – pour it until it is full cracks, TSP come clean the surface, a sealer, a masonry primer, and also several coats that paint. However, using interior paint top top exterior concrete requires secondary coat or two of top quality exterior sealer end the internal paint. Exposure come the sun and also other aspects will still cause interior paints come fade and wear an ext quickly 보다 exterior paints.

Some civilization wonder around using interior paint together an exterior primer. Even if it is to minimize expense or some other reason, you can use it together a primer. The will must be easy scuffed v sandpaper to improve adhesion and then extended with a top quality exterior paint of the same base.

Unfortunately, you may still have to repaint the surface ar in a year or two relying on adhesive qualities and also your climate extremes. Modern-day interior grade paints are formulated for internal use, no outside.

What happens If friend Accidentally Used internal Paint Outside?

Whether you got hold of the wrong deserve to of paint or simply weren’t aware there to be a distinction until that was as well late, mishaps happen. Using internal paint outside isn’t the finish of the world. It just method you’ll likely be repainting the surface in 2 to five years instead of ten to fifteen.

Interior paints room formulated because that the defended surfaces in ~ a building, not to resist the abuses nature have the right to toss around. It will fade an ext quickly and doesn’t have the additive to protect versus temperature extremes, UV, or mildew. You have the right to paint over it now with exterior paint, or wait and also do it in a year or two.

If you’ve virtually completed the job, girlfriend might too finish it. If it’s just begun, climate you have the right to switch to exterior paint and paint end it. Some suggest painting over the inner paint with an high value sealer and also considering the a class learned. Alternatively, save money and buy a high quality exterior paint in the very same color and also base rather of a much more expensive sealer, and also just apply an additional layer.

Can I paint Over Exterior paint With internal Paint?

Interior paint and also exterior paint are no the same. Modern-day technology and also chemistry have actually improved the products for indoor or out use. If you wish to apply an inner paint end an exterior paint, the quick answer is yes; the long answer is…why?

Applying inner paint end an exterior one calls for surface prep work and the use of a primer if it’s water-based over oil-based paint. If the repaint is exposed come the elements, it is vital to note it won’t stand up to temperature changes, humidity, UV, mildew, or weather factors as well as exterior paints.

Using inner paint over exterior paint might save part money initially. It won’t last together long, though, so you will do it be applying an additional coat sooner, i m sorry eats up any type of savings. It also increases the job factor. If a remodeling or enhancement has adjusted an exterior wall surface to an internal wall, you can confidently paint over exterior repaint with interior paint. However, interior paint is not recommended because that exterior use and also commonly voids any type of warranty.


Interior paint is recipe for use inside and is finest suited for the use. The paint deserve to be used outside, yet it won’t stand up well to weather extremes, and also you’ll need to repaint sooner 보다 planned.

I hope you have actually a better understanding of interior paint, why it is dubbed interior, and also what wake up if it is offered outdoors.

See more: Why Pi Is 22/7 A Rational Number ? Is 22 Over 7 A Rational Number

If you found this write-up helpful or interesting, you re welcome share it. As always, her comments and also suggestions space appreciated.