Whats a good waterproof spray for parkas?

[toes r cold]

I picked up a couple nice Swiss surplus parkas for snow blowing and possible ice fishing. They are not Gore tex. Theyre unissued/new. I want to wash them and give them a fresh coating. Only sprays I can think of is Scotch Guard and the stinky silicone "tent" spray. Anything newer and improved? TIA

[jjc155]

I have used this stuff before and it works. Doesnt really smell once it is dry either.

http://workingperson.com/products/22_101/1/983/Atsko_Waterproofing_Stain_Repellent_Silicone_Spray.html

J-

edit: hmm for some reason I cant get the link to work but the product is Atsko water proof/stain repellent silicone spray.