Board Thread:Naruto Discussions/@comment-28861328-20140618060932/@comment-3568954-20140618132308

TheUltimate3 wrote: Chibaku Tensei is the seal. No additional seal was every mentioned when discussing how the Sage put the Demonic Statue in the moon.

They probably aren't talking about Chibaku Tensei though, that would be boring. But the technique is a sealing one.

It was said that when Madara gained the Rinnegan it allowed him to BREAK the seal on the moon. which allowed him to summon the demonic statue of the outer paths(gado mazou)so the chibaku tensei itself is not the seal the seal was placed on the moon