Zep Commercial Calcium, Lime and Rust Cleaner,1L

We only use this product if other standard limescale removers do not work.This is extremely strong, so be careful if using in the kitchen and bathroom especially if your taps are gold and black etcBut it works so so well I cannot explain! Takes off stubborn limescale and rust within a few seconds. As we do not use much, it will last a very long time and definitely worth the price.Everything looks shiny like new!

One of our loos has been heavily stained for a good few months and both me and our cleaner couldn’t shift it. Thought I would give this a go before I bought a new loo but was not particularly hopeful. How wrong I was! Flushed the loo, used a plunger to get some of the water out, poured one-third of the bottle down (neat, not diluted, as was still some water in the loo) and left it for 12 hours. It looks brand new now! No scrubbing required. Miraculous stuff!

A1

This is the best product that I have tried by far for removing limescale

Worked really well, had to reapply for some deeper stubborn stains but definitely worked to remove rust marks.

I had white hardened deposit all over my quartz countertops near the sink head and limescale and rust in the sink that wouldn't budge and needed to be gotten rid of. Note i know nothing about this type of household stuff and took a risk buying this product based on reviews.One received, initially i was being ungrateful over the massive bottle size and wasn't too pleased as i wanted something small to store in my small kitchen and get rid of after (not that i should be complaining as you should get a giant bottle for £10!) and to my surprise, everything vanished as it stated!I diluted the solution 50/50 with water in an empty plastic bottle as per instructions and did wear gloves as instructed (please do wear gloves as this stuff is strong, I just wore a normal pair of disposable gloves, my long nail went through the glove on the pinky finger causing a minuscule tear so a little of the solution seeped through and gave me redness/skin rash/irritation on that finger only - completely my fault as i should have worn thicker gloves to clean) and used a non-scratch scourer soaked in the solution scrubbing all the areas that were in need of limescale and rust removal. The worktops and sink basin are all flawless now. It has gotten rid of marks that were already there when i first moved in! It hasn't managed to remove the rust off 1 of the sink plug holes but it was my first time trying it, it might need a second or third application so can't comment too much on the effectiveness on rust.I left the solution on longer than a minute but only because i was busy happily using it everywhere else and scrubbing it in more places which took time. Would say i left it on 5/10 mins max and everything washed off like a dream and so smoothly. My counter tops and sink basin are gleaming. Highly recommend this stuff! And glad i have such a big bottle now with plenty to go round for future use as i live in a hard water area and will likely be needing this again. I think the cost is expensive but given how long it lasts and how much you get, it is worth the tenner.I understand some reviews say it didn't work for them and it must be trial and error but i took a risk and tried it - and it worked amazingly! Can't fault it.

Fizzied a bit and thats been it so far , about 3 mm of a dropped lump and didnt do a thing to pure lime that got wet and stuck on flag stone , better removal with a paint scrapper

Did not remove the limescale from my shower screen, so I am very disappointed.Reached out to the manufacturer via Amazon help, but they never got back to me.