But we also believe that the Catholic Church is the Universal Ark of salvation, apart from which none can be saved. That being said, we do make the one exception of invincible ignorance, i.e. those who are outside of the Church, seeking the truth, but are sufficiently ignorant of the Truth of the Catholic faith so as to make it impossible for them to know that the Catholic faith is the true faith. Such persons, we comend to the mercy of God, for although we are bound to the Sacraments, God is not. In a sense such persons are outside of the Ark but hanging on to it for dear life. It is not the surest way of salvation. In fact, it is very dangerous compared to the situation of those in the Ark/Church, but in this sense the Church is still involved in their salvation.
As we say, "Extra Ecclesiam, nulla solus".