Well, ya' gotta use something to cover the edge gap that you must have during installation!
There are two types of Allure. The original has the sticky strip to lock the two strips together. The newer is a click lock style.
Either way, you must leave a gap around the edges to allow for expansion. The instructions say that Allure is not to be used in Rvs because of severe expansion and contraction. I have had mine in for several years with no difficulties.