Mine is by Staedtler. It says it is made of Mars Plastic. I don't know whether that means they brought back the plastic from Mars or what, but the thing will remove anything.
But I have to say, that adhesive eraser thingey is great. And, as I learned from my friends here on SC, if there's still a bit of tackiness, I just rub my embossing buddy over the spot and it's fine.
The real voyage of discovery consists not in seeking new lands but in seeing with new eyes...