TimberTech Hidden Fasteners
TimberTech hidden fasteners, including CONCEALoc, EDGELoc, SIDELoc, TOPLoc and Cortex, are matched to each board's material and edge profile for PVC and composite decks.
About TimberTech Hidden Fasteners
Choosing a TimberTech hidden fastener starts with two questions: is the board PVC or composite, and is the edge grooved or square-shouldered? TimberTech matches each fastener to board type, and using the correct one matters for warranty coverage.
For PVC square-shoulder boards, the options are Cortex, the SIDELoc Guide and SIDELoc pack, TOPLoc and TOPLoc Fascia. PVC grooved boards use CONCEALoc with CONCEALoc replacement screws. Composite square-shoulder boards use Cortex for Composite, TOPLoc and TOPLoc for Fascia & Riser, while composite grooved boards use CONCEALoc or EDGELoc. SIDELoc needs no pre-drilling and sets a 1/8 in gap. CONCEALoc can be driven pneumatically or with a drill. Stainless steel screws are available for CONCEALoc replacement and the SIDELoc Guide.
Deck builders order these with the boards so the fastener matches the profile delivered. For a quote, tell us the TimberTech collection, board edge, deck square footage, joist spacing and fascia and riser footage.

Colors, sizes and specifications
Models
| Board type | Fasteners |
|---|---|
| Advanced PVC squared shoulder | Cortex Screws for PAMFast; Cortex for Advanced PVC; SIDELoc Guide Tool and Fastener Pack; TOPLoc; TOPLoc Fascia |
| Advanced PVC grooved | CONCEALoc; CONCEALoc replacement screws |
| Composite squared shoulder | Cortex for Composite (strongest hidden option, ACQ-approved screw, TORX ttap); TOPLoc; TOPLoc Composite Fascia & Riser |
| Composite grooved | CONCEALoc; CONCEALoc replacement screws; EDGELoc |
Features
- SIDELoc needs no pre-drilling, 1/8 in gap
- CONCEALoc installs pneumatically or with a drill
- Stainless steel CONCEALoc replacement and SIDELoc Guide screws
TimberTech Hidden Fasteners photos
One product or the whole package
Order this on its own, with a few related products, or with everything else for the project. One itemized quote, shipped to all 50 states. Need someone to install it? Find an installer serving your area.
Request a quote for TimberTech Hidden Fasteners
Send plans, measurements, or photos and we will prepare an itemized quote. You can also call us with questions.




