HOMAX® Interior Aerosol Wall Texture Knockdown - Water-BasedProduct Details Aerosol Knockdown textures by Homax make it easier to apply knockdown or Southwest style drywall textures. Blending in the new knockdown texture with the old is critical to achieving a professional, flawless finish. No more bald spots! Homax Knockdown Aerosol Wall Texture can also be used to apply this attractive decorative finish to an accent wall. Once applied, this heavy bodied wall texture is knocked down using a drywall knife to