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Can Automotive Coatings Protect Your Smartphone?...

Linus Tech Tips@LinusTechTips1.8M viewsMar 3, 202014:33
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YT
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AI OverviewDefault language

The video opens by addressing a familiar automotive claim, explaining the hype around ceramic coatings and their 9H hardness rating. The host breaks down the basic science behind what these coatings do: after application and curing, they form a semi permanent layer that fills pores in the surface, creating a smoother finish and making dirt and water bead off more readily. The host then pivots to a practical experiment, applying a ceramic coating to half of a smartphone screen to see if the protection translates from car paint to mobile glass, while noting the limited implications of an oleophobic coating that phones already have. The testing setup includes a DIY approach with alcohol cleaning, a Mi 8 phone as a stand‑in for a modern device, and both front glass and back panel tests. After a curing period, the tester compares beading behavior, ease of cleaning, and scratch resistance using Mohs‑scale style scratch picks, revealing that the coating provides only limited improvement in scratch resistance. They acknowledge the thinness of the coating and contrast it with older liquid armor products, observing that the coating is not easily scratched off but also not as hard as diamond in practical terms. In the conclusion, the video emphasizes the main takeaway: the coating might improve initial cleanliness and ease of wipe‑down, but it does not deliver diamond‑like scratch protection on smartphone glass, and the cost and effort may not be justified for casual phone protection. The sponsor plugs are integrated with practical notes about how the coating’s cure time and method interact with real world usage, and the host invites viewers to consider the value of alternative protections and service plans while showing how the findings were obtained. Overall, the video blends curiosity with a cautious verdict about repurposing car ceramic coatings for smartphones, ending with a reminder that consumer expectations should align with what the coating can reliably deliver.

Topics · science_and_technology · consumer_electronics · material_science · product_testing

Questions answered

Do ceramic coatings protect smartphone glass from scratches according to the video?
The video shows limited scratch protection from the coating; while the coated area beads water more readily and remains cleaner, it does not dramatically improve scratch resistance versus uncoated glass.
What does 9H hardness mean in this context and how does it relate to Mohs hardness?
9H is a pencil hardness rating used by several coating manufacturers and is not the same as Mohs hardness. On Mohs, coatings tested as 9H pencils may still be relatively soft, and the video explains the difference between these scales.
How long should the coating cure before use, and what should be avoided during curing?
The video notes at least 48 hours of initial drying and advises avoiding washing or exposing the surface to water for 4 to 7 days to ensure proper curing.