Join Date: Jun 2004
Location: Northern Nevada
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I don't like Slime because when it DOES leak out of a large hole, I've never been able to get a patch to stick no matter how well I clean. I've had only a couple of patch failures in 30 years of cycling (glue-on patches--glueless are junk), and all were in Slime-bearing tubes.
Under your circumstances, though, I'd probably try it. It does work on small punctures (I think they claim up to 1/8-inch, which I think is optimistic), and if it keeps you riding even for a couple of blocks to get out of a scary area, it's worth it.
FWIW, I've read that you can put Slime into a presta tube by deliberately making a hole in the tube, squirting the stuff in, then patching the hole normally. But since I can't get patches to stick to a Slimed tube, I've never tried it.