Mold Defense gypsum for interior wall and ceiling applications features a moisture-resistant core and treated paper facings on the front, back, and long edges. The product, which is made from synthetic gypsum, can be used as tile backer in dry applications or in areas where some moisture is expected, like bathrooms and laundry rooms. The wallboard is Greenguard certified. The company also offers a ready mix compound that does not generate dust. 800.237.5505.