I am planning to use Ultraplan Renovation Screed 3240 on an outdoor concrete base which will eventually have a log cabin on top of it. I know I need to use a primer, Screwfix sell the Eco Prim Grip but Ultraplan suggest using Mapei Eco Prim T Plus Acrylic Primer on concrete. Will Eco Prim Grip be OK to use instead? Also, I then plan to paint this with a liquid DPM such as Black Jack Damp Proof Membrane afterwards. Thanks.