CLR Calcium, Lime & Rust Remover, Blasts Calcium, Dissolves Lime, Zaps Rust Stains, 28 Ounce Bottle (Packaging May Vary)

This stuff is Boss! It works VERY well. I flushed a truck heater core with it, and it really did work! One needs to rinse/ flush with clear water thoroughly after using it, though!

great product. works well.

Didn’t do the job I was hoping it would glass shower door crude.

This is the only thing that has been getting rid of the lime stains in my toilet bowl. The directions say to empty the water out of the bowl, but I don't know how to do that so I've just been pouring some into the bowl, wait a few hours and scrub and flush and little by little the lime is going away. Highly recommended.

This product is the gold standard. Excellent!

We applied fertilizer to our yard and some of it blew onto a joining concrete. A day or 2 later, we notice horrible rust stains on the concrete and was devastated. New home, new concrete. Searched the web and found CLR. Bought a 28 oz bottle of CLR to test what it would do. Applied nearly the entire container in an area about 2-3' x 4-5'. Put it on and scrubbed hard with a stiff garage floor broom. The directions said it had to be removed in 2 minutes so that's what I did. I then pressure washed the area and about 50% of the rust was gone. Very disappointed so I gave it another shot. This time I left it on for 3 minutes with hard scrubbing. Then pressure washed it off and I would say 98% or more of the rust is gone.Pressure washing by itself did NOTHING. If I hadn't used my pressure washer above, not sure if I would have had the same results. I have an electric SunJoe pressure washer that I've had for about 5 or more years and it still works great. Lower pressure than most gas units (2000 psi verses 3000 psi). I rate this unit better than the 2 previous gas washers I've had. NO gas to buy, less noise and my gas units just didn't hold up like my SunJoe. Disclaimer, I don't use the SunJoe that much so don't know how it would hold up with more frequent use.

It took exhaustive scrubbing to get a significant amount of hard water buildup off of a glass shower. It took so much scrubbing, in fact, that there's still hard water stains, I just don't care enough to spend any more time on it. I would dread having to continue using this product if I hadn't bought and installed a water softener, but thankfully now there isn't much in the way of buildup.

great product, so far it worked better than anything else by my faucet in bathroom