Glazed pads

You will probably say upgrade the brakes but I have a set of Shimano 396's brakes and no matter what I do they squeel.
I've changed pads, discs, tried cleaning, sanding pads and discs.
Bled them with shimano oil, solid lever feel, no more air coming though.
Allowed pistons to come out during bleed to squeeze any air out.
Bought disc cleaner.
Pedaled with the brakes slightly applied to heat them up.
Done heavy braking cycles.
Calipers are m447's
Rear one has always had issues but now the front is doing it.

Is this an issue with early Shimano brakes?
Pain in the butt, the noise is embarrassing
I've changed pads, discs, tried cleaning, sanding pads and discs.
Bled them with shimano oil, solid lever feel, no more air coming though.
Allowed pistons to come out during bleed to squeeze any air out.
Bought disc cleaner.
Pedaled with the brakes slightly applied to heat them up.
Done heavy braking cycles.
Calipers are m447's
Rear one has always had issues but now the front is doing it.

Is this an issue with early Shimano brakes?
Pain in the butt, the noise is embarrassing

0
Posts
ps thats a pic of a rotor, not a glazed pad?
Do you drag your brakes?
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Pads glazed but clean up with Isopropanol alcohol, work for a while then start to scream. It was with B01S resin pads.
I tried dragging the brakes but will need ear plugs for round 2.
Resin pads are bad for squealing at this time of year as they absorb moisture.
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I've seen people apply the brakes and pedal until the squealing stopped but I'll go for the new compound and see what happens, and the moisture thing makes senses, they would work for a while, a few muddy rides, hose down and they wouldn't be happy.
Don't mess with them.
I've had just about every version of Shimano brakes since they started making them. Never done anything to any of them except normal bike cleaning. A good hose with clean water is all they ever need.
Some pads squeal under certain conditions. Find ones that work for you. I hate sintered. Other people may differ.
I don't even bother with bedding in. Just ride to the top of a decent trail, ride down braking normally and they've always been fine.
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As already stated i just do a few hard stops and brakes been fine.
I'm using semi metallic on my bike and haven't had any issues. the only pads i don't use are kevlar just couldn't get them to bed in properly.
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I'd be tempted to change the rotors to something else as the ones used with low end shimano brakes aren't the best and are usually stamped resin only.
I got some 506 and 516 brakes, 1 finger ones so might try them and see if they are easier in the long run.
Bed the pads in properly and they will be fine*. All brakes squeal at times, especially in the wet so don't fret about it tooo much.
*The method that works for me is:
- Ride at walking pace and slam on brake.
- Repeat 10 times for each brake.
- Ride at a decent pace (10mph-ish) and slam on brake.
- Repeat 10 times for each brake.
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