Kleen Out -

: A non-acid, highly concentrated caustic (alkaline) version used as a preventative maintenance tool to prevent clogs in sinks and tubs. Safety and Usage Instructions Betterbilt Kleen Out Chemical Drain Opener, 32 Fluid Ounce

While some instructions say you don't need to remove standing water, doing so is safer to prevent the acid from splashing back when it heats up. kleen out

Just let me know the specifics, and I’ll get started. : A non-acid, highly concentrated caustic (alkaline) version

Here is an example of how it is used in context: : A non-acid

To avoid "volcano" eruptions or damage to your fixtures, follow these safety steps: