Beading falls off long before a coating fails. Road film, wax residue and hard water build up on top of it and the surface stops behaving like a coating even though it is still there.
An SiO2 topper is a thin refresh layer that goes on after a wash in about ten minutes. It is not a coating and will not rescue one that has genuinely gone.
Our pick A ceramic detail spray for use after every wash.
Out of stock right now. The alternatives below are available.
Forgiving to apply, which matters for something you are meant to use every few weeks. The easier a maintenance product is, the more likely it gets used.
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Shorter-lived than a dedicated topper. This is upkeep, not a top-up layer.
Same job, different trade-offs.
A spray-on SiO2 layer applied after a wash.
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From the same maker as one of the more common professional coatings, so it is formulated to sit on top of one rather than compete with it.
Apply thin and buff properly. Too much product is the usual cause of the streaking people then blame on the coating.
An SiO2 sealant spray, one of the longest-established of its type.
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Has been the default answer to this question in the trade for years, which counts for something in a category where products appear and vanish.
Wants a genuinely clean surface. Over road film it just seals the film in.
A paint protectant applied wet or dry.
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The most forgiving product in this category. Very hard to get a bad result, which makes it the right first bottle for somebody who has never done this.
Lasts weeks rather than months. Cheap per bottle, not per year.
A widely stocked consumer SiO2 spray.
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In every parts store, which is the argument for it. Good enough to keep a coating behaving between proper top-ups.
Thinner and shorter-lived than the specialist sprays. Expect weeks.
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How long a coating lastsGyeon Q²M Cure. A ceramic detail spray for use after every wash. Forgiving to apply, which matters for something you are meant to use every few weeks. The easier a maintenance product is, the more likely it gets used.
Every few washes is plenty and there is no benefit to doing it every time. Go by the water rather than the calendar: when beading flattens off and the car stops drying itself, it is due.
You can and it will not damage anything, but it sits on top of the coating and masks it rather than refreshing it, so you end up maintaining the wax instead of the coating you paid for. An SiO2 topper does the same job in the same ten minutes and works with the layer underneath.
Usually not. Road film, wax residue and hard water build up on top and the surface stops behaving like a coating while the coating is still there. A proper decontamination followed by a topper brings most of them back. If it does not, that is when a coating has genuinely gone.
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