what is z-guard
View PDF Datasheet. Description. Z-Guard is a moderately-low-viscosity, water-based paint that yields a relatively high hardness coating that is 86% Zirconium Oxide (unstabilized) after heating above 600Â°C (1100Â°F). Easy-to-use coating that is good for all atmospheres to 1550Â°C (2822Â°F).