i have a level sand cement screed floor and used Ardex x7r tile adhesive to stick down Dittra mating. It went down very well felt and looked good. Until my leg caught the corner of the matting and lifted it up a little bit, I then noticed that there was no bond strength between the matting and the adhesive. I very slightly pulled on the matting and it all came up very easily with no adhesive residue on the underside of the mat. I then decided to take it all up. I then carried out a test where I left the matting down until the next day where it dried, I pulled on the mating again it had not bonded. I have tried with other adhesives and I cannot get the Dittra to stick, it just pulls up.