Originally Posted by JL
So how long does it take before it is actually cured? I will wait 12 hrs like you said before i walk on them. No problem waiting another 24-48hrs to seal the grout. Thanks for the tips.
Roughly speaking, 30 days.
Honestly, it would be best to wait that long to seal it. However, most people - and for good reason - don't want to wait that long. It's too easy for there to be something spilled on it.
If you really want to do a bang-up job, do your first application of sealant after 48 hours. Then, 30 days later, clean the grout with a toothbrush, using a strong mix of bleach & water. Let it dry thoroughly, then re-seal.
Depending on how dark your grout is, and how picky you are, you might want to clean it & re-seal it at least once per year.