A ceramic coating is not a wax with better marketing. It is a SiO₂ (silica) or SiC (silicon carbide) resin that crosslinks into a glass-like film on top of your clearcoat — a real chemical layer that hardens over 24 hours and stays for 1–5 years. A spray sealant lasts 3 months because it's wiped on and rinses off. A hybrid ceramic spray ("hybrid" meaning it contains some SiO₂ but is delivered like a quick-detailer) lasts 4–6 months and is for maintaining a coating, not replacing one. A real coating earns its price because the bond is covalent — but only if you give it bare clearcoat to bond to.
That last sentence is the whole game. The number-one reason DIY ceramic coatings fail is the panel-wipe step gets skipped or shortcut. Any wax residue, polish oils, tire-dressing sling, or even fingerprints from your own washing-up will sit between the coating and the clear, and the coating crosslinks to those instead of the paint. Three months later it sheets off in patches and you blame the brand. Strip every panel with a dedicated panel wipe (isopropyl-based), in two directions, with two flips of a clean microfiber, in shade, before you open the coating bottle.
After application, the cure window is real and non-negotiable: no water, no rain, no touching, no garage humidity spikes, no driving through morning dew for 24 hours minimum, ideally 48. Plan around weather — if the forecast shows rain inside that window, the project waits. Then maintain it with a topper every 2–3 months and you'll get the durability the bottle promised.
