FastenMaster Cortex® for Decking
A hidden face-fastening system for composite and PVC deck boards where clips are not the right detail. Cortex uses screws plus matching plugs so stairs, borders, breaker boards, and square-edge zones still finish cleanly.
- Strong option for stairs, borders, and square-edge boards
- Brand/color-specific plug matching matters
- Available for many Trex, TimberTech, AZEK, Fiberon, and similar boards
- Requires correct countersink depth and install bit