yup its brush on.
and takes roughly 10 minutes to lift the paint before you can scrape it away (scraps away easily by the way...not much effort required) ....however....I took 36 grit sand paper and scuffed areas of paint which creats cuts in the paint where the stripping solution can seep into and lift the paint faster......and it lifted the paint up in as little as a minute or 2.....the stuff is pretty cool.
you can get similar stuff in aresol cans but it costs about as much as a whole gallon and does not last very long.
the brush on gallon is the much better bang for the buck.
makes for quick work of the job.
like I said earlier....only real down fall is the odor and you have to be carefull not to get it on your skin because it instantly feelsl ike someone splashed you with icyhot cream lol