Minato seals a comprehensive guide.
Its a common missconpnseption that minato can simply go into any battlefield and seal his oponents.
through out the entirety of the series mniato has shown Four different seals out of the four seals minato only has 1 that can work on a human body.
The reaper death seal
The Dead Demon Consuming Seal is a seal which invokes the power of the "death god" (死神, shinigami; English TV "The Reaper"). Once called upon, the death god hovers behind the user and wraps its left arm with prayer beads, which causes a seal to appear on it. The soul of the summoner is also seen along with the death god, restrained by its hair but still attached to the user. The death god then inserts its arm into the user's soul. At this stage only the user can see the death god.[2]
Four symbols seal
This is a sealing technique based on the fūinjutsu of Uzushiogakure. The sealing is mainly used when anevil spirit needs to be sealed. To use it, it is necessary for the user to have great ability.[1]
8 trigrams sealing style
nothing more than two four symbols seals fused together its used currently to hold the nine tailed fox.
Contract seal
When the user implements this fūinjutsu on a summoner, it removes any control the summoner has over their summoned creature. This does not mean that the user of this technique gains control over the summoned creature. Close contact and the summoner's blood appears to be required for the implementation of the seal. Minato used this technique to wrest the Nine-Tailed Demon Fox from Tobi's control.
Only one of these jutsus can be used in this battle for minato to seal his oponent.
that seal will cost him his life