My Z6 was outside for awhile. During that time, The seats became water logged. I think it soaked in from the seams because that's where it was leaching out. Does anyone have suggestions on what to seal them with.

I don't know how well it works, but you can get seam sealer for tents where they sell camping gear.

I think I will have to try that first. I figure option two would be remove the cover and spray the back side with waterproofing.

[2015 Z Force 800 53/Trail EPS]

Got to get it all dried out first. How does one do that?

Time will dry it. It is not very warm out anymore otherwise I would set them out in the sun.