How long after open RNY is is safe to put creams on scar?

I have some sort of cream to put on my scar that will supposedly minimize the appearance long term. I have no idea if it will work or not, but how long do I have to wait? I am 5 weeks post-op and My scar is healed over. Thanks!

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.