Recently found some strip caulk, Norton brand, 82760. It's a deep black, comes in nice well formed strips that don't stick to each other. When I try to stretch it apart, it breaks and doesn't get all stringy like the 3M stuff. It measures nearly the correct spec (Ford called out .19" in assembly manuals). Unfortunately, I believe this strip caulk is no longer available as I tried searching on the web. I bought 2 boxes, so this will most likely be my go-to stuff until I find something better.