Sharpshooter,

I'm in the process of lining up an order for this stuff.

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Perm-A-Barrier® Wall Flashing

Ideal for both new and retrofit applications, Perm-A-Barrier Wall Flashing is 
a 40-mil through wall membrane designed to collect water that may enter wall 
cavities and direct it to the exterior through the wall's weep system. Its 
unique green color and repeated imprinted logo quickly differentiate it on 
the jobsite from other flashing types. Easy to install, Perm-A-Barrier can be 
applied to concrete, masonry, block, steel, gypsum and wood and is highly 
effective even on vertical surfaces and around details. Available in 83.3' 
rolls in widths of 12", 18", 24" and 36".

http://www.graceconstruction.com/flashings/commercial.html