Seam sealer fail - help

Thanks for the tips. This stuff skinned over in about 60 seconds. And it was impossible to smooth it out unless I used mineral spirits on my fingers. I am gonna try another smaller bead to cover up the mess from the roof edge slope. Hopefully this will work. I had tried to pull the tape right after I had smoothed it out, but it had already setup and just tore through the sealer. Also I wonder, how hard does this stuff get? Cause right now it is certainly pliable. The old sealer I removed was rock hard and cracked out.