This has been asked for years since the Rain-X introduced. No, it will not damage wiper rubber either normal or silicone type. The wiper get damage by weather and also UV from sun.

The only problem some people see it that once the Rain-X worn off the windshield the wiper shudder because the wiper blade probably has be coated with the Rain-X earlier from fresh application of Rain-X.

So, Rain-X is good for car that does not has wiper . I almost never use wiper, so Raix-X does wonder in my case, but it does not shudder also on my car

It is different argument comparison for me.

It is not about silicone wiper swipes water cleaner compare to other wiper. Using Rain X, you don't even need wiper

Not sure if you use it right. For me, using Rain-X my wiper lasted at least 5 years because I never need to use it. If you want to use wiper, don't use Rain-X (or any other similar brand for similar purpose). Wiper and Rain-X don't mix really well together.

The main reason I did not use wiper is because over certain period it will just create micro surface scratch on wiper's path. That is why when it rain the part of the screen on wiper's path will just wet while the part that was never been touched by wipers the rain will still bead. Simply means once you use wiper, you need to always use it