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FOTU brand silicone paste

Discussion in 'Gen 3 Prius Technical Discussion' started by MrDan, Jul 22, 2024 at 9:52 PM.

  1. MrDan

    MrDan New Member

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    Ive read a lot online about this an wanted to get opinions on this topic from the prius masters here on prius chat. Can i use FOTU silicone grease on the contact point where my rotors touches my wheel hub? i am replacing my rotors and i will be buying brake parts cleaner to clean the rotor surface an i bought the silicone paste on amazon but was wondering if i need to buy copper anti seize or can i just use the paste? My rotor is making a squeking noise and the tire guy told me its time to resurface or replace them but i thought i would just replace them since i got the money and want to prolong my prius life. thanks in advance.
     
  2. Tombukt2

    Tombukt2 Senior Member

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    You won't need any pastes. You'll notice where the rotor hat drops onto the hub assembly over the wheel studs there's really no place to put paste or any lubrication for that matter The hub hat or the rotor hat the top of the hat rests on the face of the hub and that's it once the wheel nuts are tighten down that's it and sandwiched and can't go anywhere do anything but turn forward backward
     
  3. MrDan

    MrDan New Member

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    I see , so the copper anti seize is not necessary? Because I've seen videos where they put that on . But alright I'll just lubricate the caliper pins and pad ends , and wire brush hub so it won't rust thanks!
     
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    I put Permatex anti-seize on the hub face. Definitely keeps rims from sticking. Very thin application, spread around with an old toothbrush, all that’s needed.

    Also use it on points of contact between brake pads, shims and caliper.

    For caliper slide pin I use Sil-Glyde Brake Lubricant.
     

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  5. ChapmanF

    ChapmanF Senior Member

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    The concern might be about having the rotor be hard to remove later. Sometimes, in rust-prone areas, the rotor can be pretty stubbornly stuck to the hub by the next time you want to work on it. A thin smidge of anti-seize around the center hole where it sits on the hub can make that less likely, if it's something you worry about.

    A couple things:

    • The original rotors do come with a couple of threaded holes that you can use, if need be, to help pop them off, by evenly tightening a couple machine screws (M8-1.25 if I remember right). Not all aftermarket rotors necessarily have those holes; if you're putting a new rotor on, you might check for that before it's too late, if you are worried about headaches later.
    • The headaches mostly come if you leave the rotors untouched a long time. I do a quick brake inspection every time I rotate tires, and at that rate my rotors generally just flop right off when I lift the calipers. No anti-seize or special tactics needed.

    One more thing: for the parts of the brakes where rubber boots or seals are involved, Toyota specifies a grease they call "rubber grease", which is not a silicone (it's a glycol, thickened with lithium soap). Toyota has reiterated that they will not use a silicone there. I don't know what Toyota's reasons are, and others here report using silicone instead anyway, but it's worth knowing Toyota's position on that.

    [​IMG]

    If you buy the caliper-rebuild rubber kits from Toyota, they include little packets of the right grease, so you might never end up buying a tube like the above.
     
    #5 ChapmanF, Jul 23, 2024 at 12:32 PM
    Last edited: Jul 23, 2024 at 12:38 PM
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    Yes.
     

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