That is a common characteristic of higher-quality brake linings. They are harder than normal, and soften when they get warm. The biggest clue is your observation that they are noisier in humid conditions. One thing many professionals do to prevent noises is to bevel the front and rear edges of the linings a little. That removes the "fingernails-on-the-blackboard" screech. The drawback is you will lose some of the squeegee action after driving through standing water. You may have brake fade for a little while longer than normal, although people get into more trouble from the high water

Answered by caradiodoc (expert)
17,263 answers provided