the active ingredients aren't even listed ? Is this some % NaOH ? Seems like it would be important to say WHAT IT IS in the specs??

Active ingredients are not required to be listed on the label for Roebic’s K-97 Main Line Cleaner because the product does not contain sodium hydroxide, lye or any other corrosive chemicals. In fact, this product's active ingredients consist of naturally occurring bacterial cultures which break down organic debris in drains and sewer lines through enzyme action. This product, as well as all of Roebic’s biologically based products, are safe, effective, and environmentally friendly. Thank you very much for your interest in quality Roebic brand products.