XK2 is a strong liquid, acid-type drain solvent for both corrective and preventative maintenance. Contains concentrated sulfuric acid. Strong acid works quickly to melt grease and dissolve solids stopping up drain. Removes many different types of obstructions such as grease, water scale, rust, soap, hair, paper, sanitary napkins, sludge, coffee grounds, and many other organic substances. Melts grease and soap due to heat generated, and chemically dissolves all organic matter, rust and scale.