trust the label, the information's meant for the slowest cure time under extreme conditions. if it says "cures in 24 hours", it really cures in 15-20. ive used many silicone's where this was the case.

also when i was researching this, many people said aquarium grade silicone is not harmful to humans or pets. in fact i had one i got recently that said you could repair your coffee cup with it. look for "non-toxic"

hope this helps some