Paint Guard 10,000 C Paint Guard 10,000 C is cement-based waterproof thin applied plaster which is ideal for use on concrete / Plastered walls and ceilings. It fills fine pores of plaster and concrete and provides a smooth and dry surface essential for painting. Paint Guard 10,000 C is an ideal fine plaster to be used in combination with Ressi PlastoRend 120, Insulaster, or any other plaster material by Ressichem Prior to finishing it for paint. Paint Guard 10,000 C is suitable for many mineral-based backgrounds and plasters as well prior to the application of paint and wallpaper.