Ok...you don't. You have no idea. If you did, you wouldn't keep talking shit and telling people that revive-x is a great waterproofer. Revive-x is a product that re-applies a DWR (Durable Water Repellent) coating onto the face fabric of your jacket. This coating is what enables water to bead when it comes into contact with your jacket.
If you had bothered to read the goretex link I put up for you(you obviously didn't, considering what you wrote in your reply), you'd have realized that goretex does require a DWR to function at its best, but that it's still waterproof without the DWR coating. Gore tex will, however, "wet out" without the coating, meaning that the face fabric of the 2 or 3 layer laminate will absorb water. You'll still stay dry, your jacket won't leak, but breathability will be impaired, causing your sweat to render you a little wetter. This is why gore, as well as other companies that make comparable 2 and 3 layer laminate waterproof fabrics, recommend that you wash your jacket in cold water, followed by drying it in a dryer. This reactivates the DWR coating. Once in a while, there isn't enough DWR coating left on your jacket for this to work, so you need to re-coat it. This is where Revive-X comes in. You spray on/wash your jacket in Revive-x(depending on whether you get a wash-in or spray-on), and then dry it. Voila, your jacket has a new DWR coating.
DWR coatings do not render your jacket waterproof. They render it Water resistant. Big difference.
Now, about you calling me a "shit head". If you ever dare call me a shit head again, I'm going to fly to whereever the fuck you live, find you, kick the shit out of you, and then rip your tongue out and shove it down your throat, causing you to suffocate and die. Got it? Good. Bitch.
The internet is for slandering others anonymously.