HDPE Protection/Barrier Courses

Continuous Spacer Shims

Arrow-Shim Extrusions are used recessed between sash and glass or plastic sheet in conjunction with a sealant cap bead. Arrow-Shim Extrusions are designed to control and provide proper face clearance cap bead spacing while providing a uniform cushion along the entire perimeter of the glass. Easier to install than round shims.


  • HDPE-20 Protective Vapor and Root Barrier: A 20-mil sheet that not only serves as a protection course but also acts as a vapor barrier in waterproofing applications
  • HDPE-40 Protective Root Barrier: A 40-mil sheet that prohibits aggressive growing roots from affecting the performance characteristics of a waterproofing membrane in planters and greenscape applications