I have a diamond camo tarp from http://www.mosquitohammock.com/
that I have used with my BB in nice weather. Don't think I would want to trust it in a heavy rain.
Its more of my "its summer time and there is not rain in the forcast so I will take it just in case" tarp.
Offers less protection and weights twice as much as my cuben tarp from Hammock Gear