What is the best way to seal the grout lines on a glazed ceramic tile floor?
There are many grout lines since the floor consists of many small tiles:
1x1, 1x2 and 2x2 mosaic pattern. Can I just brush the silicon over
everything and then wipe the tiles clean after it dries? It would be very
time consuming to apply the silicon just to the grout lines.

Thanks in advance for any advice.

Herb