Why wheel cleaner causes brake disc rust?

[locarno]

Why wheel cleaner causes brake disc rust? We're talking about bloody wheel cleaner. How to find wheel cleaners that don't cause rust ?

[supercharged75]

It's probably from the water after rinsing the cleaner off causing rust. There is a product that will stop this but I can't recall the name right now. But I don't think the issue is the wheel cleaner itself.

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[glen e]

Never had a wheel cleaner cause rust. Any rust or on the disc rotor itself is usually gone after I drive it. if you really want to make sure you don’t get any rust user leaf blower to dry the whole assembly after you clean it

[Klasse Act]

Get some Brake Buster

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[Desertnate]

What part of the brake rotor are you talking about. The hats, the outside edges of the rotors, or the faces of the rotors where the pads make contact. Any form of moisture will cause certain areas to rust.

Depending on the brand of the rotor, most will rust along the edges and the hats simply because they are untreated steel and you have to live with it. The rotor faces will rust quite quickly when they get wet, but it will go away the first time you drive the car and use the brakes to stop or gradually slow down.

Most of the time rust on the hats and edges of the rotors is unsightly, but harmless. Fortunately I've seen a few aftermarket brands these days offer rotors with edges/hats which are painted/treated with some material to prevent them from rusting. That's the route I'm going whenever my current set of rotors wear out.

[Azure]

It's probably from the water after rinsing the cleaner off causing rust. There is a product that will stop this but I can't recall the name right now. But I don't think the issue is the wheel cleaner itself.

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Hydes Serum

Hyde's Serum Rust Stopper, rustopper, anti-rust solution for wheels

[Eldorado2k]

Get some Brake Buster

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Does it actually prevent it from happening?

Someone should demonstrate/compare it vs. a typical wheel cleaner. You’d figure the manufacture would’ve shown it instead of just claim it. I know if my product could do that you’d never see the end of it.lol.

….Just imagine… “El Cheapo Wheel Cleaner” with brake preserver. Never have ugly brakes again!

[Klasse Act]

Does it actually prevent it from happening?

Someone should demonstrate/compare it vs. a typical wheel cleaner. You’d figure the manufacture would’ve shown it instead of just claim it. I know if my product could do that you’d never see the end of it.lol.

….Just imagine… “El Cheapo Wheel Cleaner” with brake preserver. Never have ugly brakes again!

It reduces it consuderably

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[Bobby B.]

Moisture will cause surface rust on your brake rotors. Hyde's Serum Rust Stopper works great, but it's been on a manufacturer backorder for months.

Hyde's Serum Rust Stopper, rustopper, anti-rust solution for wheels

[Desertnate]

I'll just drive my car!

In all seriousness, typically just pulling my car into the garage after a good wash and lightly riding the brakes will clean the rotor faces of any surface rust. I had no idea a product like this existed. If you do apply this product in the driveway and then pull the vehicle into the garage, I wonder how much of the product will remain on the rotors?