Didn't find my manual yet, but the wife isn't home from work to ask where it might have been placed. But did google it, and found a listing of the pages, page by page. Heres the link.

http://www.tpub.com/content/tentsshelters/TM-10-8340-222-10/index.htm

Also found a manual on ebay for $8 if you are in need of one. Search there for that.

I scanned the maintenance area of the link above, and didn't see anything specific on waterproofing. If you do look for waterproof coating material for canvas, specify that this is a lighter weight type of canvas. You wouldn't want to add too much weight to this fabric. I had one long ago shred under the weight of heavy snow. (Borrowed it to an uncle on a Montana elk hunt-they left it up and unattended.)

Good Luck