Bell Self Sealing Inner Tube?

I got 3 Bell Self Sealing Inner tubes and I added one to my bike. In 2 days I got a flat tire. So I went to the gas station and I put some air in it. When I found the whole on the inner tube, this blue stuff came out of it. So I was guessing that it was the so called "self sealing." I'm about to add my second... show more I got 3 Bell Self Sealing Inner tubes and I added one to my bike. In 2 days I got a flat tire. So I went to the gas station and I put some air in it. When I found the whole on the inner tube, this blue stuff came out of it. So I was guessing that it was the so called "self sealing." I'm about to add my second inner tube but is there anything I am suppose to know before I add the inner tube?
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