Diamond multi tool blades are excellent for grout removal. With over 5 years experience at re-grouting shower recesses, I can personally vouch that diamond blades are my preferred tool.

Carbide blades do the job, but I found that they wore out quicker. They can also be a bit less forgiving on the tile edges when cutting out the grout. That’s not to say that I don’t use carbide blades. For example, the 10mm narrow carbide blade is mandatory in my multi tool grout removal blade tool kit.

In combination with the multifunction tool and its blades, a good diamond drop saw is helpful for the removal of grout on the floor tiles, but not absolutely necessary for the do it yourselfer. All professional re-grouters should have one of these in their kit however.

My typical multi tool grout blade kit consists of a half moon 91mm diamond blade, half moon 63mm diamond blade, the diamond swing blade and the 10mm narrow finger carbide blade. These blades will help you properly re-grout a shower recess.

The half moon 91mm diamond blade is the big brother and will do the majority of the grout removal work in a shower recess. It is very forgiving on ceramic tile edges. I have cut the grout out of 6 shower recess walls with the one blade and it still has plenty of use left in it.

The half moon 63mm diamond blade is capable of the same work. It is useful if the grout you are trying to remove is very hard. Because of the smaller diameter , the blade edge oscillates in a shorter distance and allows the multi tool work harder with less strain on the motor.

The diamond swing blade is awesome. In my opinion, it is a mandatory inclusion for those who wish to re-grout showers and bathrooms. This blade will get you into the corners and tights spots where it is difficult to remove the grout. But, be careful. If you use this blade at the wrong angle, it will act as a mini hammer and can chip tiles. However, if used correctly this is not a problem.

The final multi tool grout blade is the 10mm narrow carbide blade. It is absolutely necessary for removal of grout around circular drains, curved grout lines and other hard to reach places.

In some cases it can be beneficial to use wider carbide grit blade where you have wide grout lines and tough tiles, like porcelain tiles.

These blades are also useful for other applications such a cutting tiles. For example, I had to cut out a broken tile that was partially lodged behind the shower screen. To completely replace the tile the shower screen would have needed to be removed. Instead, I simply cut the tile as close as possible to the shower screen and replaced it with a tile cut to size. After I grouted the tile and silicone sealed between it and the screen, it looked as good as new.

So the above tools sum up my list of essential multi tool grout removal blades. After a few years with using different types of blades I believe the ones above are usually all one needs for the typical shower recess.

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