Board Thread:Theories and Speculation/@comment-30241447-20161016052814/@comment-25122992-20161016100953

I think that the seals themselves were created by Hagoromo through the use of the Rinnegan, but once they were completed, they can be given to anyone regardless if they possess Rinnegan too or not. It doesn't seem like either Hagoromo's or Sasuke's Rinnegan played any role in the sealing process.