Is silicon harmful to chickens?

[Akrause57]

I want to use one big Poland spring jug and the horizontal nipples to water my hens. I made a trial one with a plastic peanut butter container and it leaked like crazy. If I put silicon DAP around the hole I drill for the nipples, can it harm my hens?

 

[TomNY]

Check the tubes. Some are safe for food contact.