Bullen Airx RX 32 bio-enzymatic drain opener is not an acid or caustic. Works natures safer way, but faster. With Airicide and an additive for immediate action. RX 32 is a unique environmentally friendly bio-enzymatic formulation that replaces the hazardous products needed in the past to open clogged and sluggish drains and traps. It has been specially formulated to attack the grease and fats that are the usual cause of blockages in kitchens and the body oils and soap film that build up to clog drains and lines in showers and bathroom sinks. Bio-enzymatic action has been natures way of degrading waste since the beginning of life, but until now, enzymes did not act fast enough to solve an emergency drain problem. Now with advanced chemistry, this proprietary formulation acts immediately to break up fatty, greasy blockages. Safer for personnel - contains none of the corrosive poisonous chemicals normally associated with drain openers. Safer for plumbing - contains no acids or caustics to generate heat or pressure and affect joints or plastic piping. Septic systems - the bacterial strains formulated in rx32 are safe for use in a septic tank system. Safer if splashes or spilled - contains no acids or caustics to harm skin, carpeting, clothing, marble, terrazzo, etc. Clean air formula - contains no VOCs to pollute the atmosphere. Safer for our drinking water - contains no chlorinated solvents to contaminate ground water. Works faster than other bio-enzymatic digesters because it liquifies fatty, oily, greasy blockage faster (actually faster than many highly advertised but corrosive brands). Works natures way - for millions of years, the earth has been cleansed of waste by bio-enzymatic action. Rx 32 functions in this same way, but by releasing specially selected organisms, it just works faster. Starts a bio-film on the inside surfaces of drain lines, that if maintained, can pr event the accumulation of grease and future blockage.