The first reason is to seal a porous surface such as a painted chalkboard so that you can easily erase your liquid chalk markers.
Chalk markers for chalkboard painted walls.
Liquid chalk markers 10 pack with gold silver bold dry erase marker pens for blackboard windows chalkboard signs bistro 6mm reversible tip 50 chalk labels included 4 2 out of 5 stars 10 12 95 12.
Liquid chalk marker pen white dry erase chalk markers for chalkboard signs windows blackboard glass 6mm reversible tip 6 pack 50 chalkboard labels included 4 7 out of 5 stars 721 10 95 10.
The second reason is you would like to seal over top of your chalk markers so they can t be erased.
This method is perfect for erasing chalk marker marks from any surface that have been painted with chalkboard ink.
Positive art chalk markers in a set 30 different colors mean the world is your chalkboard.
Every premium hue is non toxic and works on any non porous surface.
To use it just dampen the sponge slightly with water then use it like you would use a regular sponge and simply wipe down your surface.
Doors walls frames etc.