Gyeon is a Korean chemistry house with its European operation in Poland, and it is the brand most people mean when they say “ceramic coating” without naming one. The range splits cleanly: Q² is the coating line proper, Q²M is the maintenance chemistry built to live on top of it, and Q²R is the professional tier sold through trained installers.
What makes Gyeon worth the shelf space is not the coating — plenty of brands make a competent SiO₂ coating — it is that the maintenance line is designed as a system. Bathe is pH-neutral because it has to sit over Mohs; Cure exists because coatings need a topper that does not fight the base layer. Buying Gyeon means buying a chain of products that were specified against each other.
The catch is availability. Gyeon runs distributor-exclusive in Canada and does not sell direct, so pricing is consistent across retailers and there is very little room in it. Expect to pay list.
Strongest for: coating maintenance, iron removers, drying towels. Weakest for: polishing compounds, where the range is thin next to Menzerna or Koch-Chemie.