Hi, does anyone know what is the best glue for installing a recycled rubber floor atop plywood? 

I am putting the flooring in my van, it is a product called “Elephant Bark” from Rubbercal, comes in a 4 foot wide roll and is made out of recycled tires.  The manufacturer recomended BASF Chemtrex, which I have to special order. . . and which looks almost exactly like Locktite PL Premium adhesive.  Maybe the PL premium at my local hardware store will work just as well? 

Thank you!