How Hard is NanoSlic? Lily Wood October 29, 2018 18:42 Updated Follow When fully cured, NS100 series and NS200 series develop 9H pencil hardness according ASTM specification D 3363. Related articles How Thick is NanoSlic? Does NanoSlic Protect From Ultraviolet Light? Can NanoSlic Be Removed? NS-110 Does NanoSlic Work in High Humidity? Comments 0 comments Please sign in to leave a comment.