If you glue allure it will buckle when it expands I used the 1/4 round and it looks great and the floor has held up well under extreme desert heat and Idaho winter weather. The brown caulk sounds like a good way to go also it would allow for expansion.
Greg aka SeaDog Ret Navy
2016 Flagstaff 26 FKWS TT
96 Winnebago Adventurer 34RQ W/SO (selling)
06 F350 6.0, Harley Ultra Classic ๐ 64 corvette ๐