The latter. You are spreading your chakra through the whole barrier until it breaks.Hmm.. Do I force my chakra to penetrate it/ through it or do I push my chakra onto it to disturb its chakra manipulation and sustainability almost a more gentle approach?
You are placing a sealI send my chakra outwards creating a very tempremental cube of chakra around the seal. Though the barrier may seem solidly shaped and formed. Its fragility is extremely high making it severely temperamental especially to physical contact.