Can penetrating sealer fix a bad new grout installation?
Hi, we're at wits end trying to deal with a bad ceramic floor tile grout installation. In the past, we've done our own tiling, but decided to hire out this job due to the size.
A few days after paying off the contractor, I started to wash the floor for the first time (making sure it had time to cure) and the grout (Polyblend sanded) started washing out too--in fact, it could be dug out with a fingernail, even though it had been 2 weeks since the work was done.
Everyone we talked to and everything we read suggested the tiler either mixed up the grout wrong or used too damp a sponge to clean the joints. Everyone but the tiler, that is--who insisted it was bad grout we had purchased (and maybe it could be fixed just with a sealant). Finally, he agreed to come back, scrape all the old grout out, vacuum the joints and re grout using the same Polyblend--with my husband doing the mixing this time and helping with the actual grouting.
Well, a week later, the new grout still wasn't right (it was better than before, but not as hard as it should be), so we decided to test a penetrating sealer to see if that would help with water resistance. It did, but before we seal the rest of the grout and hope that my next floor washing won't end up like the first, could someone tell me if this has any chance of working?
The grout looked fine to our eyes (no lumps, etc). and it was mixed up in the correct proportions per the manufacturer. The only thing that's unusual is we live in a high desert, very dry climate.
Thanks for any input!