Ardex Engineered Cements introduces a wall patching and finishing system for overhead and vertical concrete and masonry walls. This jobsite-tested combination is an easy-to-mix, sandable solution for deep filling and skim coating surfaces prior to sealing or painting. Ardex OVP is for precast, cast-in-place concrete panels, and tilt-up walls. Especially suited for large jobs, it offers extended pot life and working time. For last minute surface preparation and repairs, Ardex TWP finishing compound offers fast filling and smoothing. Ardex Engineered Cements. 888-512-7339.