Uni-directional Vapor Barrier (10 lin. ft.)

• Vapor barrier only.
  
• Minimum lengths of 10 linear ft. x 5 ft. wide (50pc total)
• ( costs per square feet $0.85)

Uni-directional Vapor Barrier ;

Allowing air to circulate from the outside of your walls to the inside allowing it to dry out through your ventilation or internal heating, but the interior air/humidity does not pass through the walls, thus preventing it from coming into contact with the metal of your Van which could create condensation and/or corrosion.