Those with passionate views about how much to tip the pizza-delivery guy, please see the information in the footnote provided by two other sources. (For a look at the real reasons we tip and whether tipping has anything to do with the quality of service we receive, click here.)
Liquid Grout Sealer. 1  1. Allow new grout to cure for 48 to 72 hours before sealing. 2  2. Tape off baseboards and other nearby surfaces to prevent unintentional staining. 3  3. Apply sealer using a foam paint brush, paint pad or a small roller.  4. Wait 5 to 15 minutes to allow the first coat to soak into the grout.
The grout process is similar but immediately after working a smallish area, say 4 x 4, a barely moist, appropriate sponge should be used in the initial swipe/clean up. As the grout drys, which will be fairly quick, a wetter sponge can be used. Grout too should be allowed 24 hours to be safe. Steven Wolf. Obviously there are Mastiks like some used for verticle installations that will dry/set/cure faster, but even a decent bathroom wall tile job should be no less than a 2 day process.