Clean your chalkboard surfaces easily with the Securit Liquid Chalk Marker Cleaning Spray (500 ml). Developed specifically to remove Securit Waterproof Chalk Markers. The spray cleans your chalkboards in three easy steps, spray the surface, leave it for 10-15 seconds and wipe it off with a cloth or our Securit Reusable Sponge. This cleaner is non-toxic.