Almost anything can be sprayed with this airless paint sprayer. The Ultra Max II sprayer is the choice of the high volume contractors that need a machine that can pump extremely heavy materials like wallboard mud and waterproofing coatings. It's most popular application is spraying a skim coat of wallboard mud to give a Level 5 finish. It is redefining the level of productivity possible on demanding jobs that simply cannot be handled by convential airless equipment.