If the product was stored in a proper place without getting to hot or to cold I would think that the product that you mentioned would still be just fine to use. I have a bottle of ButterWax that I would not hesitate to use. i\It is two years old. make sure it is shaken well before using and apply thin. Just like the directions say. Good Luck!!
Keeping the products in an air tight bottle, at room temperature and shaking them every so often (once a month) will yeild a long shelf life. Try it out... if it works, it works, if it doesn't... time to get some new stuff.