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Cosmoline: Fact vs. Fiction

Updated: Sep 1, 2021

Cosmoline is one of the most maligned substances in the world. The word makes people cringe, and for good reason. Cosmoline was originally designed to protect metal parts from rusting and corroding during shipment or storage, but the myth that it was meant to be a long lasting protectant grew almost as fast as its use. And if you're reading this blog post because you're thinking about wiping off that cosmolined #Porsche, STOP RIGHT THERE! It's not as easy to do as you might think!



What is Cosmoline?

Cosmoline is a waxy, brownish, oily substance used to prevent rust and corrosion on metal. It is usually applied to the underbody of cars and motorcycles before storage or shipping.


What purpose does it serve?

Cosmoline does serve a wide variety of purposes, though within the context of Porsche (and some other vehicles), it has only one. Cosmoline was sprayed onto the vehicles underbody during the final production stage, so that while in transport by boat, the sea salt mixed air would not penetrate the fresh aluminum suspension and driveline parts, and cause premature corrosion.


Is it safe to remove Cosmoline?

Absolutely! Cosmoline is and was never intended to be used as a sustainable, long term, corrosion protectant. In fact, 90% of the engine, transmission, subframes, etc. are not coated with Cosmoline. When the Cosmoline is applied by the factory, it is only applied to the vertical surfaces, and not intricately applied.


Cosmoline was intended for use only during vehicle transportation and not as a long-term rust protector. It can take several hours or even days to completely remove by hand, but it attracts dirt, dust, and water which has the potential to do more harm than good in the long run. And we all know how much you love your Porsche (we won't tell). So now put down that brush and spray and contact us today!

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