Dry erase paint creates a smooth, relatively non-porous surface that most dry erase inks do not penetrate. Dry erase ink is similar to permanent ink with the exception that it contains a surfactant that allows the dry erase ink to be easily removed from the surface of the dry erase paint as long as the surfactant is present in the ink film. Usually the surfactant dissipates from the ink film over the course of several days. Once the surfactant is gone, the dry erase capability of the ink depends substantially on the ink release properties of the dry erase paint.
The most popular dry erase paints are generally formulated from one of two types of resin systems, either aliphatic polyurethanes or modified polysiloxane resin systems. Both types of dry erase paints should be applied by professionals using appropriate safety measures and safety equipment.
Modified Polysiloxane Whiteboard Wall Paint
Modified polysiloxane resins are high solids, low VOC coatings that create a tightly cross-linked, chemical resistant, and stain resistant film over intact substrates. Due to the properties of the modified polysiloxane resin system used in these products, the dry film has excellent dry erase ink release properties, including graffiti resistant properties. Such dry erase paints can be used on both exterior and interior substrates to create custom dry erase walls on smooth surfaces. Modified polysiloxane resins have a disinfectant odor similar to those found in health care facilities and thus are suitable to be applied in occupied buildings by professional applicators. Precision Coating’s EeZeClean Dry Erase Paint is based on a modified polysiloxane resin system.
Aliphatic Polyurethane Dry Erase Paint
Aliphatic polyurethanes when cured result in a smooth relatively hard surface. Aliphatic polyurethanes consist of a resin component and a Hexamethylene Diisocyanate (isocyanate) activator component which requires the professional applicator to take respiratory safety measures such as wearing an air supplied respirator during application. According to OSHA isocyanates are a chemical that “can cause occupational asthma; irritation of the skin, eyes, nose and throat; and cancer, OSHA reports. Isocyanate exposures have also caused deaths due to both asthma and hypersensitivity pneumonitis.”
Both water-borne and solvent-borne aliphatic polyurethanes are used in the dry erase paint market. The water-borne aliphatic polyurethanes have less odor, but since both the solvent-borne and water-borne aliphatic polyurethanes contain dangerous isocyanates, the application should be done when the building is fully evacuated and the applicators are wearing air supplied respirators or air monitors. Aliphatic polyurethanes should NOT be used in occupied buildings due to the presence of airborne isocyanate during the application. Aliphatic polyurethane dry erase paints offer a varying range of ink release properties. Some of the water-borne aliphatic polyurethane dry erase paints warn against the use of red and pink dry erase markers from various manufactures. The published material cost per square foot for aliphatic polyurethane dry erase paints run from $1.30 per square foot to $3.99 per square foot in kit units.
EeZeClean Dry Erase Paint Developed for Application Safety, Low Odor, Workability and Performance
EeZeClean Dry Erase Paint has no BPA or isocyanates and is designed to be safely applied in occupied buildings with minimal impact on adjacent work areas.