Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this product for its exceptional effectiveness in removing hard water stains, calcium buildup, and rust from fixtures, tools, and surfaces. Many highlight its ability to dissolve years of stubborn deposits that scrubbing alone couldn't touch, with soaking overnight yielding dramatic results that restore water flow and appearance. Reviewers consistently describe it as reliable and powerful, with many reporting years of repeated use and consistent performance. Several appreciate its versatility beyond plumbing applications. A small number report it didn't work for their specific situation, though these are significantly outnumbered by positive feedback.
Customer review summary generated by AI, including incentivized reviews.The best for calcium buildup
My my sinks new
Verified Purchaser
Rust stains removed w/ CLR
Removes hard water and rust stains with ease.
Verified Purchaser
CLR Cleaner
Works great, cleaned shower head by removing grit in small holes opening up for better water flow
Verified Purchaser
Classic and the best
Would RecommendGreat product, the classic is great at cleaning hard water stains off bathroom fixtures.
Verified Purchaser
G & J Handyman
Would RecommendWorks every time. Great price. Fast and easy.
Verified Purchaser
Great product
Would RecommendVerified Purchaser
Sierra Vista Lowe's
Very pleased with all the products purchased at my local Lowe's. The ED employees were knowledgeable, polite and helpful. Couldn't be more pleased. That's the way shopping should be.
Verified Purchaser
Haven't Used Yet
Would RecommendHaven't Used it yet. But arrived undamaged.
Verified Purchaser
GOOD RESULTS
Would RecommendWORKED WELL
Verified Purchaser
Rust and stain remover
Bought for stains in the toilet and sink and it worked. No more stains.
Verified Purchaser
This worked great with getting rid of calcium deposits and clean my stainless steel sinks.
Verified Purchaser
Great Selection and people
Would RecommendGreat Selection and people