I have to agree with Ernest on this one.
After much research I found that Cleveland brakes have a similar warning that their seals are compatible with red aircraft fluid (Mil-H-5606).
Originally I thought that any of the modern, high-tech brake fluids would be better but after reading the instructions I changed my mind and decided to use what is known to work. If you use other than what is specified and there is a failure, you can't blame the brake supplier and it may even invalidate your insurance (if you can get insurance that is).
Jim
Well I can surely agree with you guys on the insurance angle. The whole deal smacks of Buracratic BS though.
Bill