Zski, Deet might be a factor in the delaminating issue, and/or age. Sno Seal would seem to plug up the breathable outer layer.

Let us know about that atsko treatment zski?
Do your need to wash/clean before you apply like the other DRW treatments? IF it works as good as their Sno-Seal product, it would be a real keeper.

Before I understood just how bad DEET was for synthetic fabrics and of course people, I had that delaminating issue on a coated nylon rain jacket.

I don't even carry Deet anymore, I find the Permethrin clothes soak to be adequate and easier on the synthetics as well as me.

ok :  got this stuff on the jacket
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and water is beads off better than ever. the test was rather short so not sure about a soaking rain.
spray on, let dry, activate in the dryer. they say the coating is supposed to last 25 washes.

also used similar product by the same company on some packs and such
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product seems to work well, the only downside is the propellant ran out before the product. this on both cans

third product to consider:
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beading is nothing, how about rain bouncing off !

THIS is the stuff to watch out for: 
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i have issues with all of the aerosol water proofers running out of propellant before the liquid is gone. i sprayed both tents and rainflys yesterday. i was hoping to have enough between the two cans to do my rain coat, but ran outta air. oh well. my coat still beads well, its 4 years old, but i only use it for canada. it packs down so the size of 2 slices of bread and fits nicely in the pocket of my lifejacket.

i used the atsko silicone this year and last year and in previous years and it always seemed to work well. other years ive used the kiwi brand stuff and i didnt like it as much. i spray a whole can on each tent every year.

the last 2 years i did the atsko silicone. when i applied it yesterday, the spray actually pooled on top of the fabric a little in certain spots. in years after the kiwi brand, the atsko has soaked into the fabric nearly everywhere.