Can you use CLR in the toilet? Always read label instructions before use.
Apply CLR Calcium, Lime & Rust Remover directly to the stains and scrub with the brush or pumice stone. Wait for 2 minutes then flush the toilet. Repeat this process as needed until the hard water stains begin to be removed.
How long can you leave CLR in toilet? Never leave CLR on an area for longer than two minutes. If the stain does not disappear, use CLR full strength and then wipe and rinse promptly with cold, clean water.
What happens if you leave CLR on too long? 3. Don’t leave CLR for longer than two minutes. Again, CLR is acidic, which makes it effective, but also means it can cause damage if left in contact with surfaces for too long. Always rinse away with cool water after two minutes of contact.
Is CLR safe for porcelain? (Formerly called CLR Bath & Kitchen)
Use on most bathroom surfaces including: porcelain, ceramic tile, shower doors, sinks, bathtubs, white grout and caulk, toilet bowls, and fiberglass. Will not remove rust.