Is outside quality emulsion paint REALLY any different from the indoor variety?

because I painted my shed five years ago with some leftover emulsion from my front room and despite being told it would all wash off in the rain it is perfectly ok....perhaps slightly faded.


PLEASE ONLY PROFESSIONAL ANSWERS TO THIS ONE as it is VERY important to know the TRUE facts..thank you!Is outside quality emulsion paint REALLY any different from the indoor variety?
normal emulsion is a water based paint where as a proper exterior paint such as smooth strong hold by crown has other additives in it which make it alot more hard wearing, so yes there is a difference in your outdoor paint than your indoor stuff. I am surprised that your shed has survived for 5 years with no rot as emulsion has no preservative in it which is what your shed needs give it a few more years and your shed will start to rot.Is outside quality emulsion paint REALLY any different from the indoor variety?
Interior paint is composed of vinyl polymers, exterior paint has acrylic polymers , uv resistant colors, and fungicides added, generally thicker even thicksotropic (jelly )


Dulux weathershield UK has a 15 year guarantee,


Its never a good idea to go for cheap paint, it takes too many coats, and works out dearer in the long run.
An interior paint wont necessarily peel used outside..but exterior has more polymers and acrylics in it..better pigments etc..and the uv rating is better for reflective values from the sun...fading will not be as drastic as interior over time ..but interior will adhere
mix your leftovers with 50/50 unibond and it will be waterproof and long lasting
If your shed is wood, and you painted it when it was very dry, the paint would be absorbed into the wood. This is probably why your shed still looks quite good. If you give it another coat once in a while it should last for ages.

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