GreenGuard MAX offers the best in building wrap performance. You get the barrier properties walls need for moisture protection and energy efficiency. Plus, you get the durability and economical price that makes the GreenGuard innovation a real world practicality. GreenGuard MAX is nonperforated, providing superior resistance against rain before the siding goes on and against water that seeps through the siding after installation. Stays UV stable up to 4 months. Highest water resistance, air barrier for energy efficiency. Permeable, superior tear resistance and nonperforated. Nominal thickness .018".