HG Tile Cement Grout & Mortar Remover, Cement Remover & Grout Remover for Wall & Floor Tiles, Tile Cleaner & Residue Remover, Surface Cleaner Strengthens Existing Grout - 1 Litre

Worked well. But you must use concentrated form.

Bought this as had really bad efflorescence build up on Victorian (straight to earth laid) tiles thanks to a leaky pipe! It’s worked quite well on my tiles which are old and bit tired looking and worked fairly well on cement build up too. You do need to use quite a bit to make a difference though and I found it better used neat in the worst patches rather than all over. It’s not worked perfectly but might be worth a try if you have similar issues with an old floor like mine.

This was brilliant. Following a repair of some grouting, last year, I foolishly didn’t remove the grout residue quick enough. Much, if not all of this was down to inexperience. The result was that there was a load of unsightly, solidified grout around the surface of the tiles in a wet room area. I looked this up and thought I’d give it a try. It was brilliantly effective and I’m now in the good books again. Definitely worth mentioning that this stuff is effective because it is corrosive, so always try a small bit first and make sure you read and adhere to the precautions. I wore chemical resistant gloves from a local DIY shop, as well as goggles.Anyway, from our perspective, this is a great product.You will probably need a mop and plastic bucket and a stiff, small width brush (which will degrade considerably in the process - or at least it did in our case).

NOTE: this is how i did it.Although i had put down plastic sheeting i accidentally got cement on the driveway.The cement had dried and been left for perhaps 2 to 3 weeks. maybe about 1mm thick only though.Also there were small sections where there was cement staining .1st step - Jet wash the driveway and remove as much of the cement as possible. This probably removed about 90% of the cement.2nd step - dilute 4 to 1 ratio (Water:cement remover).3rd step - tried a small section in a somewhat hidden corner to ensure that it doesnt ruin the brick paving slabs. (Make sure you do this! my bricks were fine - but you should check yours anyways.)So far all good.4th step - as my brick pavings seemed fine i proceeded to work on the real problem areas.Ensure to wear rubber gloves and goggles. Read the instructions for proper protective equipment,Using an old paint brush apply the solution to the area you want to treat.Using a steel brush scrub the cement. Then wait a couple of minutes. scrub again.Depending on how bad your cement is this could take a long time.wash with jet wash.and if it still hasnt worked do it all again.It took me a long time but eventually it did come off.It wont work will on really think concrete only residues of cement really.and the Jet wash is a must otherwise i dont think it would have come off.

Really impressed by this - messed up on some tiling and had dried adhesive/grout on the faces that just wouldn’t stop hazing up. A once over with this on a sponge and it just disappeared!

Leaves stains doesn’t even work had to replace the tiles due to it rotting the tiles and them cracking do not bother it has cost a fortune to repair the damage this has caused

I've used plenty of HG products and been impressed by them. Even so, I was sceptical that this one would work on a bathroom floor we inherited with rock-hard, ingrained grout/tile cement/mortar that had been there for years.But, as you can see from the before and after pics, it really did work. Needed to leave it to soak in as per instructions. Then the recommended stiff scrubbing brush was pretty effective but I needed to help mine it on its way with careful use of a small wire brush. Fairly time consuming but the results were well worth it. Make sure you wear protective clothing - especially eye protection.

I just mixed up a small amount in an old mug. I had to use a greater concentration than suggested by the manufacturer. I used an old tooth brush and worked it into the area where cement had dropped. It took about four or five applications, letting each one dry out between each application but it did remove the cement without effecting the colour on the resin driveway I used it on or on the bricks themselves. Be patient with it and just keep applying it in stages and it will work.