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DOT 5 is hydroscopic, it will absorb water! I agree with Mr T2U and change every few years, esp w/ steel lines.



no, DOT 5 silicone is not hyGROscopic.
http://en.wikipedia.org/wiki/Hygroscopy

That's one of its major benefits!

The reason there still may be a water problem is that the water does NOT mix with the DOT 5, and it settles at the lowest point in the system, which is usually an expensive caliper.