Mapei Ultraflex RS Premium Rapid-Setting Tile Mortar with Polymer, Gray speedset and in commercial or heavy-use

and in commercial or heavy-use residential showers where drain capacity matters

Classic medium oak tone with consistent grain — reliable and versatile

this is the size that actually delivers on the "spa-like" promise

No-hub coupling hardware for connecting to 3" pipe

just physics — but it's avoidable

Mapei Ultraflex RS Premium Rapid-Setting Tile Mortar with Polymer, Gray speedset and in commercial or heavy-useSetting tile? Ultraflex RS Premium Rapid Setting Tile Mortar with Polymer, Gray is the thinset that goes between your tile and the substrate. Rapid setting formula gets you grouting same day instead of next day useful when the schedule's tight or you're working in a heated floor area where slow cure is a problem. Use under tile from 2 to 3 thickness. ANSI A118. 4