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Multi-tool grout removal blade

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  • Feb 20th, 2023 4:58 pm
[OP]
Deal Fanatic
Nov 2, 2005
5008 posts
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WFH

Multi-tool grout removal blade

Need to remove some ~1/8" sanded grout line. Leaning towards a multi-tool blade.
With prices varying from reasonable to absurd, what have you used and what would you recommend.
15 replies
Deal Fanatic
Jul 30, 2003
6365 posts
1067 upvotes
Toronto
I probably will try these $4 tools from dollarama - its just a manual tool but had carbide and other stuff on it to clear the grout.
Old grout - usually comes out pretty easy cus its brittle. I sense a strong metal with automated tool will probably damage the tiles?

PS: Probably will have to go around, saw it two months ago and it disappeared pretty quickly.
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Jul 29, 2006
595 posts
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Ottawa
I started with the cheap, manual tool you can buy at the home store but it got dull quickly. I was doing my whole shower which was like 6" square tiles times like 100 so a lot of grout lines.

I moved to my rotary tool using diamond bits. I used the cheap ones from Princess Auto so went through 3 or 4 of them but it worked. It makes a lot of dust so I also held the shopvac nozzle close by to suck it up. Lowes may have the correct one but they are expensive. The Princess Auto kit is linked below.

https://www.princessauto.com/en/30-pc-d ... 0008048993

If you have a multi tool, maybe something like this will work better but they are expensive. Careful though, it will be quite easy to go right through the wall behind the tile.

https://www.canadiantire.ca/en/pdp/mast ... ml?loc=plp
[OP]
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Nov 2, 2005
5008 posts
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WFH
cliff wrote: I used the dremel one, iirc it was ~$40 at the time - and looks like it still is now. Be careful about tile intersections if you have a running bond, easy to chip things (but that might depend on the tile.)

https://www.homedepot.ca/product/dremel ... 1000658931
Yeah, the Dremel is one of the ones I've been considering. Their accessories are usually decent quality. What was the life span like?
congo wrote: I started with the cheap, manual tool you can buy at the home store but it got dull quickly. I was doing my whole shower which was like 6" square tiles times like 100 so a lot of grout lines.

I moved to my rotary tool using diamond bits. I used the cheap ones from Princess Auto so went through 3 or 4 of them but it worked. It makes a lot of dust so I also held the shopvac nozzle close by to suck it up. Lowes may have the correct one but they are expensive. The Princess Auto kit is linked below.

https://www.princessauto.com/en/30-pc-d ... 0008048993

If you have a multi tool, maybe something like this will work better but they are expensive. Careful though, it will be quite easy to go right through the wall behind the tile.

https://www.canadiantire.ca/en/pdp/mast ... ml?loc=plp
I've got the diamond bits and was planning to use them to get into the corners but thought a multi-tool blade would be significantly faster for the bulk of the lines. The Mastercraft looks expensive for something on unknown quality and a 1* review.

I notice Home Hardware also have a couple of lower cost options but lack of reviews is not encouraging.
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Jul 29, 2006
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dirtmover wrote: Yeah, the Dremel is one of the ones I've been considering. Their accessories are usually decent quality. What was the life span like?



I've got the diamond bits and was planning to use them to get into the corners but thought a multi-tool blade would be significantly faster for the bulk of the lines. The Mastercraft looks expensive for something on unknown quality and a 1* review.

I notice Home Hardware also have a couple of lower cost options but lack of reviews is not encouraging.
My only concern with the multi tool is keeping control of it. It may quickly veer one way and chip or gouge a tile. When I was using the rotary tool, I had very good control since I was able to rest my hands against the tile. Also, my grout lines varied in width so I had to swap bits to accommodate that. The bits at Princess were cheap but got the job done.
Sr. Member
Feb 3, 2012
563 posts
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T.O.
dirtmover wrote: Need to remove some ~1/8" sanded grout line. Leaning towards a multi-tool blade.
With prices varying from reasonable to absurd, what have you used and what would you recommend.
I regrouted my bathroom and manually remove a layer of the old grout using tool with a carbide blade. The multi-tool will work but I was worried I might damage the tiles as the gap between the tiles were very narrow. I done this 6 years ago and the new grout still looks great. I regrouted using silicone tile grout that did not require sealing.
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Aug 5, 2003
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North York
dirtmover wrote: Yeah, the Dremel is one of the ones I've been considering. Their accessories are usually decent quality. What was the life span like?
I was able to do all the cleanup needed in a 13x20 room - I could have been neater with the backbuttering, so it was to clean up the space before grouting so I didn't have any of the mud showing through. Was still in decent shape after the job, but I haven't done any meaningful tile work since.

I haven't done it, but would think those rotary bits would be much harder to control if you were doing a large area. The oscillating bit would ride along the side of the tile which made it slightly less painful.
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Dec 26, 2005
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Thornhill
sputnik99112 wrote: I regrouted my bathroom and manually remove a layer of the old grout using tool with a carbide blade. The multi-tool will work but I was worried I might damage the tiles as the gap between the tiles were very narrow. I done this 6 years ago and the new grout still looks great. I regrouted using silicone tile grout that did not require sealing.
I did this too. A whole area where the grout colour was inconsistent... think it was this one:

https://www.homedepot.ca/product/qep-gr ... 1000180560

So this removes enough to re-grout, but if I need it all out, I use this:

https://www.homedepot.ca/product/qep-pr ... ?rrec=true

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Sep 1, 2005
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When you say "some", is it just a foot or so or is it like a whole/part of a room. How much grout are you looking to remove?

Speed/power tool is fast and less laborious but of course there is always a risk of it moving and chipping tile.

For speed tools like oscillating or reciprocating saw, you need to go slow and go light.

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Member
Dec 17, 2017
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I've used the Bosch carbide blades for this. Not really cheap but they've all worked well and held up well doing entire rooms. They also have a combination model with a pointed face for the corners and a round face for the field. https://www.boschtools.com/ca/en/boscht ... -142812-p/ Also how much is some? If it's only a bit the manual tools aren't too bad. If you're doing an entire room just spend on one of the carbide oscillating blade options.
[OP]
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Nov 2, 2005
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gr8dlr wrote: When you say "some", is it just a foot or so or is it like a whole/part of a room. How much grout are you looking to remove?
Not huge amount, maybe 70-80 linear feet.
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Sep 1, 2005
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dirtmover wrote: Not huge amount, maybe 70-80 linear feet.
70-80 feet is not little...I'd be looking at not manual methods.
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Failure is always an option...just not the preferred one!
Newbie
May 26, 2020
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sputnik99112 wrote: I regrouted my bathroom and manually remove a layer of the old grout using tool with a carbide blade. The multi-tool will work but I was worried I might damage the tiles as the gap between the tiles were very narrow. I done this 6 years ago and the new grout still looks great. I regrouted using silicone tile grout that did not require sealing.
What silicone tile grout did you use? Any links?
Sr. Member
Feb 3, 2012
563 posts
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T.O.
JC00000 wrote: What silicone tile grout did you use? Any links?
Apologies for the late reply... I had used premixed Fusion Pro grout. I bought it from Home Depot.
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