Stu wrote:
Ham Sulu wrote:
If I use this product to whiten my tile grout:

http://www.doityourself.com/invt/6515639#Specifications

Do I then have to seal it as well?

This is a waterproof product so once it is dry you should be able to
wipe it clean without a problem. I have not used this one but have used
similar and it looked like I had just retiled.

Silly follow-up question: would it help to seal it or is there no point
and the seal won't take on top of a waterproof product? It beginning to
sound like I'm going to return my tile sealer.

Thanks!