Perfect for cleaning chalkboards, black boards, white boards, dry/white erase boards, magnetic or non-magnetic. Effective at removing marks left from chalk, non-permanent markers, chalkboard paint, liquid chalk and dry erase pen. Easy-to-use - simply spray the surface and wipe it clean with a sponge, rag or paper towel (not included). For old/set ink, spray and allow the cleaner to set-in for 2-3 minutes before wiping.