Jelmar CLR PRO CL4PROEA Calcium, Lime and Rust Remover, 28 oz Bottle

This was an excellent purchase! This is super easy to use. The smell was fine. The cleaning powder was impressive. The size was excellent for the price was super effective as I used it on my showerhead and drained and it really helped instantly removal was great and also really helped with The water blockage in the showerhead. I would definitely recommend to any homeowners.

Worked to clean out a heater core. I now have full heat!

great product! Great cleaner

I bought this to use on a drain in my utility room that had rusted over. It works great but you do have to do a little work on your own as well. I poured it on the drain and waited maybe 5 minutes and that's all it took to then be able to clear out some of the holes on the drain and get the rust off. It doesn't just remove the rust for you - you will need something like an allen wrench to poke through the holes or a scraper to get the rust off of the surface. The rust color did not go away but it certainly looks better than it did. The bottle doesn't leak and is not heavy so it's very easy to use.

Does the job! Like everything else in the world, I recall the bottles being so much bigger and less money, but that’s what happens when you become an adult buying everything you wasted as a child/young adult

Cleaned our fountains with water recirculation pumps right up, madam is very pleased.

Good product I have used for years

I was originally disappointed because I used around 60% CLR and 40% water and let it soak for 24 hours and it pretty much did nothing at all to the calcium. Vinegar seemed to be way more effective and cheaper too. White Distilled Vinegar costs $4 for 128 oz, whereas CLR costs $12 for 28 oz (three times a much for almost 1/5th the amount). That means that CLR costs around 12-15x as much as vinegar.But then I tried the CLR a second time. This time I used 100% CLR and 0% water. It did a great job of removing the calcium, so I was happy.I am probably supposed to use fresh batches of CLR each time, but I used a metal strainer and will try reusing the CLR again in the future. I am supposed to clean my warm mist humidifier every two day and CLR is too expensive to be using fresh batches each time. Cleaning Vinegar is slightly stronger than White Distilled Vinegar and costs around the same, so I will try alternating between Cleaning Vinegar and pre-used CLR to keep my humidifier clean.CLR is good at removing rust too. I put a few drops on a screw that I could not remove from a saucepan handle and it removed around half of the rust.