A tough fabric top with an aggressive rubberized adhesive that has the flexibility and strength to withstand structural movement and concrete shrinkage cracks up to 3/8″ without transferring the stress load to the finished tile topping. AFM is designed for thin-set tile applications. Installations requiring more than 3/8″ of thin-set mortar need to be raised with a self-leveling compound or a pre-mortar bed and allowed to cure prior to installation of AFM.