Panfisher, Check for a product called "CampDry". I bought a can at WalMart from the camping section. It's silicone based spray on. Several applications may be needed. No guarantee of longevity in all day soakers though.
Not odor free so I'd treat ASAP.
IMHO the stuff is no better than silicon sprays found in automotive. Ummm, not the stuff sprayed through them wee little straws. Unnnnnnless you squeak a lot, while moving.
Perhaps you might find some useful info by clicking the following link. I dunno? Good luck.
https://www.popularmechan...rproof-again-16925311/