Vinegar (acetic acid) has long been known as a natural way to kill unwanted vegetation. This product is 30% concentration of acetic acid. It may be applied full-strength (undiluted) for difficult weeds, or diluted 2:1 (2 parts vinegar to 1 part water) to make a 20% concentration for easier to control weeds.
Concentrations of acetic acid greater than 6% should be handled with caution as they can be irritating or even harmful if handled improperly. Do not ingest, inhale or otherwise touch without gloves this material. If it comes in contact with skin or clothes, wash off with clean water as soon as possible.