If you are sealing the grout only and you do not need sealer on your tiles at all, then you want to survey away the sealer that inescapably gets on the tiles over the enforcement operation promptly after enforcement. If you do not take off surplus sealer, you could be left with foggy looking tile or other apparent flaws. Strip fully cured sealer is much harder than survey away the surplus when it is yet vulgar. Make certain that you do not overshoot this stride.