Are Sacraments necessary for salvation?

An AOG friend of mine recently quoted this from the CCC " “The Church affirms that for believers the sacraments of the New Covenant are necessary for salvation.” (p. 319)
They claim this contradicts with the concept of salvation by grace, justification by faith(romans3:28, romans5:1 etc) and John3:16 about whoever believes will have eternal life.Why then are the Sacraments stated as required for salvation, what about those who do not receive them?

These links should give you the answers that you need. If you have any further questions or concerns that are not answered by this, please contact Catholic Answers directly.
Recommended Reading:

[LIST]
*] Anointing of the Sick
*]The Forgiveness of Sins
*]Confession
*]The Permanence of Matrimony
*]Early Teachings on Infant Baptism
*]Baptismal Grace
*]Born Again in Baptism
*]The Necessity of Baptism
*]Confirmation
*]Christ in the Eucharist
*]The Institution of the Mass
*]Assurance of Salvation?
[/LIST]

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