The reason why Hashirama can control bijuus was because he inherited the Sage's Body, which housed the Jyuubi, and as such he had dominion over the Bijuus. It isn't because of the Uzumaki clan or any sealing techniques that allowed Hashirama to do it, but purely because of bloodline.
I believe Madara had his EMS sealed away by Hashirama. If you think about Hashirama can control bijuus through sealing techniques and his own special mojo. I think he pulled an Uzumaki and sealed the EMS away. Now Madara is half ethereal and half corporeal.