Grout Seal


  #1  
Old 03-12-05, 11:47 PM
coverland
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Grout Seal

I installed 12" wall and floor tiles in a bathroom with 2"x2" tiles on what used to be a painted, concrete shower floor with a 6" stub wall about six months ago. It's all holding up nicely but I did find recently, some missing grout where the 2" tile meets the schluder <sp> which supports the bottom of the 12" tile as it goes up the wall. Gaps were approximately 1/4" or less and I used a fine brush wire wheel in a drill to clean off any soap scum or old grout sealant prior to re-grouting. The grout repair *seems* to have gone well and now my 3 days (or so) are running where I mist the grout a couple of times a day to get some cure time prior to using the shower again. Here's the big question... Instead of using a conventional grout sealer, should I use clear silicone or tub caulk? They make some supposed 50 year stuff now and in my experience with it, it seems more effective than what my experience with the grout sealer was (kind of a cheezy bottle with a brush end used to dab the grout lines). The grout was a sanded portland cement grout (though now in retrospect, I wonder if I should have used an epoxy since it's a shower floor). Anyway, just trying to protect the investment with whatever I can get in there with to protect existing grout lines. The integrity of the grout appears to be holding well - just wondering about a longer term sealant for it.

2nd question as a quickie... what is the preferred method of cleaning grout lines prior to re-sealing? The wire brush *seemed* pretty effective but not being an expert, there might be something that works better. thanks
 
  #2  
Old 03-13-05, 12:31 PM
J
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The joint should have been caulked in the first place. See if they have one that matches the color of the grout. I am referring to the joint where the floor meets the wall. Take out the grout and replace it with caulk. Use regular grout sealer and follow the directions on the bottle.
 
  #3  
Old 03-13-05, 12:57 PM
K
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The walls and floor will shift a little independantly, so you need a flexible joint between them. Actually, if it was done right you don't really need a joint there as water would have to run uphill to get anywhere.
 
  #4  
Old 03-14-05, 02:36 AM
coverland
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Here's a link that shows the issue, guys... Keep in mind as you look at it that the rest of the grout line as it goes around the shower is in tact and looks good. For that matter, all the grout on the shower floor looks good. Anyway - is there a problem with using clear silicone caulk over the grout line to seal it instead of grout seal? I ask that wondering if the clear silicone would hold up longer and protect the grout better than grout seal. ??

http://www.geocities.com/overlandtrail/BATH1.JPG
 
  #5  
Old 03-14-05, 01:09 PM
K
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For that I'd rake out all grout along the joint and apply a polyurethane caulk marketed (by colour, mainly) as masonry caulk. It's the same gray as the grout and even has similar texture. It also adheres and holds up in most cases better than silicone.
 
 

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