Regrouting a shower. How do you prevent "bleed" thru after digging out old grout, and putting in new grout
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Use a diamond or carbide tip, drill bit for grinding. If it a shower wall you probably have 1/8 inch grout lines so use a 1/16 inch. BUT whatever your grout lines are make sure the drill bit is SMALLER. Use that to grind the old grout out. It will leave no remnants just dust. When done really get ALL the dust out the cracks. The dust is what mixes with the water in the new grout and "bleeds".. Also try and go with a premixed LATEX grout. Those tend to form quicker and allows less BLEEDING so to speak.and.there you go, Hope It Helps.
If you are going to use a dark color grout it should be no problem but bleed through can occur if you use grey thinset and then grout the tiles with a light color grout before the thinset has cured. Since you are re-grouting existing work you should have no problem.
Depending on how much you're doing, it might be worth investing in a MultiMaster. Among other things, it makes re-grouting a piece of cake. Great tool. And it leaves very little dust because it oscillates rather than vibrating like a lot of other tools. It does all sorts of things so it'll be well worth the investment if you're a regular DIY'er. Check out the video demo under the information section of this website. You'll see what I mean.
www.allinonetools.com.au
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