I have always used, and would recommend Dicor over Sika. I love Sika products for their polyurethane concrete joint fillers, but IMHO, EPDM roofs should be done with Dicor.

YMMV

http://www.amazon.com/Dicor-Rubber-S...keywords=dicor

Always handy to have a little on hand if you have a habit of dragging your rig through any trees. Hell, some of the older improved campgrounds we go to it's easy to snag a tree and tear/cut the EPDM roof when you're trying to make that tight corner with a 30+ 5th wheel.