Question on self-sealing tire tubes and tire liners?

When a self-sealing inner tire tube is punctured (up to 1/8"), it is said to reseal itself. But does it reseal the puncture for good or does it just give me enough time to get to a place where I can change / patch the inner tube? Also, does using tire liners affect the tires in any way at all (aside from... show more When a self-sealing inner tire tube is punctured (up to 1/8"), it is said to reseal itself. But does it reseal the puncture for good or does it just give me enough time to get to a place where I can change / patch the inner tube?

Also, does using tire liners affect the tires in any way at all (aside from keeping me from having flat tires)? I have a mountain bike but I use it only on paved trails.
4 answers 4