Floweasy fast acting professional strength buffered organic digester and liquid drain opener instantly dissolves, hair, grease, sludge, soap, paper, and any organic materials. Safe for use with metal and PVC pipes, septic tanks, stainless steel sinks, fiberglass tubs, toilets, and standing water. Virgin sulfuric acid with 12 buffers and inhibitors. No. S95-701: Size: 1 pt, Type: Professional Strength, Physical Form: Liquid No. S95-703: Size: 1 qt, Type: Professional Strength, Physical Form: Liquid No.