West Marine sells the stuff. . .it's around $40. Sorry I can't recall it's
name. It's a latex-type liquid poured into air fill hole, after which the
dink in rotated in all directions to spread it on interior. Several people
have reported good results with both Hypalon and PVC dinks. You can call the
manufacturer to ask about suitability for your particular application.
Len

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"Brada" wrote in message
...
My old inflatable has become porous. It's made of the neoprene, not
hypalon.
Have heard about some liquid that impregnates the rubber from the inside.
One is supposed to sip it into the chambers. Please if anyone knows where
to
find it (web address). Any experience?
Thx in advance.