My experience with Slime tire liners is an absolute win. They tell you not to cut them, but I measured carefully and cut so no overlap or shortage. Paying for thicker rubber which may or may not help makes less sense to me than the small amount of cash spent for liners. Of course, we're talking about protecting a tube here - any glass cuts you get will compromise the tire, making it necessary to get a new one anyway (in some cases). I guess you could say six of one, half a dozen of the other.