It IS in Catholicism. There is NOTHING that you can do that's enough. There's always more to add to the mix, just to make sure.
And for all that, the best the average Catholic hopes for is a short a time in purgatory as possible.
The purgatory concept is based on a human view of 1 Cor 3:12-13 and other passages having to do with various kinds of judgment encounters with Jesus in eternity.
My read: Because we will go into eternity short of completed actualization of reconciliation (we are reconciled in status) there will be a final encounter where all is squared between our souls and the gracious, all-forgiving, but never excusing Lord. This is where He will dry our tears; we will weep at the realization of how we disappointed the Lord, as well as in the realized comfort of the reconciling Lord. The heavenly Kleenex folks will have big business here, if I can use such a light hearted metaphor. If this is a “purgatory” we would be stupid to shy away from it. But I understand it as more of a final reconciling moment.