For interior paint where temperature is not a problem, the binding resins are more rigid, which cuts down on scuffing and smearing. Another big difference between interior and exterior paint is the flexibility. Interior paint does not have to deal with drastic temperature changes. While it may be tempting to use your leftover interior paint the end result will not last as long or look as good then if you were to use an exterior paint.
We recommend first using a suitable undercoat to prime the cubbyhouse like Zinsser Cover Stain to seal the wood and prepare the surface.
Once dry you can then apply the top coat, exterior paint like Dulux Weathershield or Berger Solarscreen would be the best products to use as they provide exceptional coverage, tough flexible finish and will not blister, flake or peel. They also have excellent durability which allows the paint to expand and contract with climate changes. As always, for the best advice regarding products and application we recommend you contact your nearest Inspirations Paint store.
Visit our Project Showcase for more useful project tips and advice. Some trading restrictions are in place. Learn More. Not only can they end up looking hideous, in some cases they can contribute to structural damage.
It can be problematic when you use interior paints on the wrong interior surface. Choosing to use interior paints of any kind on an external surface for your home or business can be a real problem. The chemistry behind interior and exterior paints has changed a great deal in the past few years.
Paints are specifically designed for use on certain spaces. Modern paints are designed to deliver a more reliable surface in specific environments. At their most basic level, there are two main kinds of paints; water-based and oil-based paints including vinyl soft sheen paints. It would be simple if one type of paint was designed for internal use and one for external use. However, both kinds are available in compositions to suit both surfaces. When it comes to exterior paints, oil-based paints are better at resisting dirt.
However, it is also common for water-based latex paint to be used on external surface. The advancements in the chemistry of paint allow for more specialty brands and products. Knowing the difference between interior and exterior paints will ensure a more successful paint job. All paint falls into two categories: water-based paints also referred to as latex paint and acrylic paint or oil-based paints. Until about ten years ago, oil-based paint was widely used on exterior surfaces because it was more durable and affordable.
However, it has been proven that it is harmful, even deadly, to the environment and the people in the area where it is applied. Because of that the government has greatly restricted its use, except is very small amounts in rare situations. Water-based paint is now the common choice for use in both interior and paint projects. There have been many improvements in the ingredients to improve adhesion and coverage and it has many additional advantages.
The drying time is significantly shorter than oil-based paint, which requires up to 48 hours to dry, leaving the room unusable during this time. Latex paints also have a minimal odor and release significantly fewer VOCs during the drying process.
Water-based painted surfaces are easier to clean and dry faster than those painted with oil-based paint. They resist yellowing and fading overtime if protected from sunlight.
All white pigments come from inorganic sources, with titanium dioxide being the most common. Organic pigments mix, blend, and disperse in the base and have better transparency than the finely ground inorganic particles which are mixed and suspended in the base. A higher inorganic particle count creates more solid content, which results in deep rich colors. Binders hold the pigment together to create a durable film on a surface.
The plastic-like polymers provide better adhesion to different surfaces, and resistance to abrasion, and household cleaners. Oil paints commonly contain drying oils such as tung, linseed, or modified oils. There are many reasons for wanting to use interior paint outside.
Interior paints have a different formulation than exterior paints. Interior paints are more porous, lack the necessary resin to bind them to exterior surfaces, and are more likely to crack and flake.
If you are determined to use interior paint outside, it should be sealed with one or two coats of exterior-grade, clear-coat sealer. Using interior paint with a sealer increases the amount of work, and makes more expensive exterior paints a cheaper finish. Additionally, using interior paint outdoors voids its warranty. Painting the inside surface of a front door with interior grade paint is fine since the surface is protected from the elements.
You can use the same paint on the exterior of the door if it is protected with a storm or glass door; otherwise, it may fade, crack, and chip.
Using interior paint on interior concrete walls or slabs is possible with a lot of prep work — filling cracks, TSP to clean the surface, a sealer, a masonry primer, and several coats of paint. However, using interior paint on exterior concrete requires an additional coat or two of quality exterior sealer over the interior paint. Exposure to the sun and other elements will still cause interior paints to fade and wear more quickly than exterior paints. Some people wonder about using interior paint as an exterior primer.
Whether to minimize cost or some other reason, you can use it as a primer.
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