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What’s The Difference between Exterior & Interior Painting Components?

Simply put- almost all paints consist of similar basic components- which include solvent, additives, pigment and resin. That being said- the actual paint manufactured for peripheral and interior wall surfaces are totally different. So, is the environment to which they are used.

The truth is, every surface demands specific properties, and to meet up those requirements quality paint manufacturers produce paint with different properties.

Most quality painting services in Sydney will tell you that exterior and interior paints have similar solvents and pigments, but there could be a situation where the exterior paint may have more pigments.

The prime difference between both these paints is found in the resins (epoxy, acrylic and even silicone) and additives (which presents paints properties like making the paint application smooth, making it appear clean and prevents algae and moulds).

“OPC Painting”- your on-point affordable colour painting services PTY LTD, will present you an in-depth analysis of the component differences between exterior and interior paints.

Here’s Starting With Exterior Paints:


  • Exterior paints are generally exposed to vivid environmental conditions and hence requires extra protection against UV rays, fungal growth and course dampness during a downpour.

  • The resin used in exterior paints could be a tough softer much so that they can survive temperature changes along with the ill-effects of moisture. Furthermore, the resin needs to be more flexible to tackle contraction and expansion.

  • Some exterior paints will also come with numerous additives also including pesticides and fungicides. And for that, they need sunlight to cure. Plus, some exterior paints also contain VOC (Volatile Organic Compounds) and while curing it could enter the house make it unsafe for residents.

  • Another crucial aspect of exterior painting is that it can be applied to a wide range of substrates by changing its sheen. During rainfall, the exterior of the house works like a sponge soaking all the rainwater from the wall surface. And the flat point allows the water to escape without hampering or bubbling the painted surface.

Now About Interior Paints:


  • Interior paints have more to do than just boost up the house decor and aesthetics. It lends easy maintenance, dampness prevention and easy-to-wash conveniences.

  • Moreover our interior painting specialists in Sydney state- interior paint can withstand heavy abrasion and is designed more delicately as compared to exterior paints. Plus they are easily scrubbed, formulated to be more resistant to physical damage and staining.

  • Speaking about resin in interior paints, they are firmer because they don’t have to deal with weather and temperature differences. Plus, interior paints also don’t need to be fade resistant mainly because they aren’t subjected to extreme temperatures.

  • Other appreciative components of interior paints include zero VOC, which helps preserve the air quality of your house and reduces your personal health. It doesn’t involve any adverse fungicides and pesticides, and it made to be easily washable.

  • Lastly, all good quality interior paints ought to be stain resistant to hide stains or roller marks and can get cured even without direct sun exposure.

Final Words:

At first exterior and interior paints may appear similar. But only when you compare them based on their components, additives, environment and purpose; you can easily figure out.

All these details come in real handy at the time of purchase, so whenever you decide to buy paint, check the tin properly to get a clear picture of the key components.

And if you need any further assistance to paint down your exterior and interior wall surfaces, then feel free to opt for our affordable painting services in Sydney anytime without worrying about your project scope.

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