seal off from
seal off from (someone or something)
1. To bar entry into some place from someone or something. A noun or pronoun is used either before or after "off." Police sealed the building off from the public while the investigation took place. We need to find a way to seal off the store room from these rodents.
2. To completely isolate someone or something from someone or something else; to make someone or something totally inaccessible to someone or something else. A noun or pronoun is used either before or after "off." The prison warden sealed off the inmate from the rest of the prisoners. The museum sealed the antique off from visitors after the attempted theft.
seal something off from someone or somethingand seal something off
to make something inaccessible to someone or something. The police sealed the building off from everyone. They sealed off the building from all the reporters.