ok i lied, they don't line their tires- they hate liners! haha
they seal all of them. He told me to tell you to either use sealent in your tires, or to get i forgot the name of the tire. but i will ask him again and let you know. he said though that the reason why he doesn't really recommend armadillo's is because they are just a really really stiff,hard tire-making it hard to work with.