Interior and exterior painting are the two types of painting techniques available in the painting industry. Exterior paints are made to withstand inclemently and at the same time be able to resist cracking, chipping, mould and mildew.

Interior paints are also designed to resist stains and when scrubbed they can not be damaged because of the chemicals that are included in the paint.

Interior and exterior paints have ingredients that are unique and crucial depending on the base. Oil-based paints are formulated for exterior paintings while water-based paints can be for both interior or exterior painting.

Binding Resins in Interior and Exterior painting

Binding resin is the determinants in interior and exterior painting. This will give you the results on how the paint will cling to the surface. Acrylics are found in exterior paints as the bonding resin which has a strong bond and is also durable. While interior paints have epoxy and silicon and are odourless as opposed to acrylic which has a harsh odour.

Pigments in Interior and Exterior Painting

Pigments are responsible for colour, some use organic which are safe for breathing in interior painting. Painters tend to use more non-organic pigments in exterior paints because they don’t fade quickly.

Exterior paints use more chemicals for adhesion, protection and durability whether they have harsh odours or not.

Various Additives in Interior and Exterior Painting

Painters use different types of paints in interior and exterior painting depending on their additives. Interior paints have fewer additives as compared to exterior paints. This is because they don’t experience harmful conditions.

On the other hand, exterior paints experience all kinds of weather and temperature. To handle the weather conditions more additives are added to help in protecting the surface from fading, cracking and creates stability.

Exterior paintings have Mildecides as additives that prevent mildew and moulds.

Levels of VOCs in Interior and Exterior Painting

Volatile organic chemical (VOC) produces fumes that are a health hazard when singled. In the interior and exterior painting, the level of VOCs should be considered. Exterior paints have a high level of VOCs and luckily enough they get outgassed into the open.

Interior paints have very low levels of VOCs because they are not intended to be used inside.

The following are some of the differences you can come across in interior and exterior painting.

• Adhesion can be achieved both in interior and exterior painting.
• Dry time will be different both in interior and exterior paintings. This is because oil-based paints dry slower than water-based paints.
• Resistance to fade is very different in interior paint as it has fewer additives, unlike exterior which has lots of additives that protect it from sun rays.
• Temperature resistance varies for both interior and exterior paints. Exterior paints will withstand a variety of temperatures.

Conclusion

Interior and exterior painting have their consequences depending on the application. When interior paint is applied on the exterior you will probably have cracked and fading. When exterior paint is applied in interior surfaces then you will end up having fumes then will lead to health complications. Always use the best paint and for the intended purpose.