Bottle and spray nozzle just like your house hold cleaners are in(it comes bulk un mixed , can be diluted need youd need a sprayer). Spray it on (you better wear a mask and chem resistant nitrile gloves) let it kick in then spray it off with soap, or spray it on use a fine brush to aggitate it and then spray it off with soap. Take it from me , wear the gloves or you could end up having a trip to the hospital like i did. Another slight off topic tip with this product *spray excessively on tail pipes and mufflers that are rusty as hell , let it kick in for 2-5 minutes then respray it with acid and using heavy duty chem gloves(elbow length) grab the tail pipe and twist your hand around and around till a brown lather forms then spray it off with soap and walla new tail pipes. Works great on diesal ford truck exhausts that rust when brand new even..