After trying several different products that claimed to clean the black tank in our live-in rv, this product really worked. After one 24 hr treatment and following the directions the smell was gone! I re-treated then washed the tank out and after almost 2 weeks in near 100 degree temps we still have no odor.
can feel the lubed difference when black water valve is open/closed. recommended to me by RV service tech who cleared a blockage around tank drain valve.