It depends on the jacket. Some clothes etc. are designed to be waterproof but only are if you spray the seams, for example. Other clothes etc. are not designed to be waterproof, and spraying them won’t make them waterproof because the fabric just isn’t (unless there’s some hard-core spray I don’t know about). I expect different sprays and fabrics work well together, but I would consult the clothing and spray documentation, or good sales staff (e.g. at REI) to figure out what works best on what.