Which is the best glue for led strip light?

Epoxy resin glue is large share in the market,low price,but low weather protection. PU glue better than epoxy but not good for health. Silicon glue is the best one for led strip light,not yellow change,low temperature resistance,good weather protection.

Does silicon waterproof can reach IP68 level?

Many factory make the waterproof with silicon glue inside the silicon tube.They said this is IP68. In fact this can not reach IP68.When using after 6months to 18 months,It will have problem more or less. Lightstec call this is IP67 leve. IP68 level need to use injection molding process.This use a injection machine protect the strip light with silicon material.