According to Catholicism, would a person who had a vasectomy but never had sex afterwards be committing sin?

While I’m aware that the Catholic Church teaches that having sex after a vasectomy (or getting your tubes tied for women) is sinful because it is an act of contraception, I was wondering if the church taught that the act of vasectomy itself was sinful. Would a person who got one be sinning even if he never had sex for the rest of his life?