The Cortex Concealed Fastening System is a secure method to fasten your Trex Composite Fascia Boards while still allowing them to expand and contract with the changing seasons. With color-matching plugs made from the exact same Trex material and texture as your decking, the Cortex plug system delivers an unblemished look with incredible holding power.

Trex Fascia boards complete the look of your outdoor living space, and the Cortex Plug System gives those fascia boards a smooth, polished, professional finish.

The Cortex Concealed Fastening System includes one Counterbore Tool to create the ideal hole size, one TORX® ttap Setting Tool to ensure a consistent depth for a strip-free install, 100 1-3/4 inch epoxy coated screws, and 105 color-matching plugs. One package will cover approximately 50 linear feet.

You can find Cortex plugs in perfect color and texture matches for any Trex deck or fascia board, including all colors of Trex Transcend, Trex Select, Trex Enhance Naturals, Trex Enhance Basics, and the new Trex Transcend Lineage line, plus Trex's Woodgrain White fascia color.