It might seal but I wouldn't fit it.The question has to be asked, how did it get damaged? Major kerbing that damaged the rim?
I have found a set of very cheap "as new" tyres, but then find out why they are so cheap - see attached.What do more exp. and pro's among us think..?
think what will happen if you get a total deflation at 50mph.............does that scare you. if no, go up in 10mph increments until it does.