Adamantine Sealing Chain Barrier

Using her chakra chains, Kushina can erect a barrier that is strong enough to prevent anyone or thing from neither entering nor leaving the perimeter defined by the chains. The barrier is very durable, as Hiruzen stated that there was nothing anyone could do to interfere with what Minato and Kushina were doing once it had been erected.

 Barrera de Cadenas de Chakra