So how shot is my roof?

Jonnygsx wrote:

westend wrote:
Yup, you need to get all of the bad, oxidized surface back to what you have cleaned in the picture. It doesn't matter if all of the white comes off in the process. You will be good as long as there is sound material left after your cleaning.

Thats what im worried about though. Look how much black rubber came off when I scrubbed it. Im worried theres gonna be nothing left. Whatever is left certainly isn't going to be a solid surface for the liquid rubber to adhere to or do you think it will still be solid enough assuming I dont rub through any of the rubber. (it didnt feel paper thin but obviously having rubber come off that easily was startling)

I think it's always a shock when someone first cleans rubber. I'm guessing that you are using a butyl cleaner with a lot of strength. Dilute the cleaner and it will pick up less rubber.

To illustrate to yourself that the type of removal you experienced isn't that abnormal, try your cleaner on a tire and see what you get. I bet you will see the same result on your rag.