Waterproofing?

[*zap*]

Obviously a waterproof pack cover is going to be best @ keeping your stuff dry in a rain but....
Are there any recommendations on a treatment for the pack bag so it will repel incidental moisture or light rain?
Thanks

 

[rogerdoger]

I would try nikwax Tecwash or get the silicon spray and give it a few coats. Or bring a trash bag, if it’s is going to be wet line your pack with that.