Originally Posted by
cyccommute
I don't agree. Slime makes it slightly more difficult but with proper preparation around the hole in the tube, the patch should stick to the rubber without issue. It's still made of rubber. "Proper preparation" would, of course, mean keeping the Slime off the prepared area.
I haven't tried patching a slime-filled tube myself, so I don't have first hand knowledge. I do have a bottle of slime which I might use in my gravel bike, though.