Cortex Hidden System for PVC Trim

The Cortex Hidden Fastening System for PVC Trim is the fastest, easiest way to hide fasteners in PVC Trim - and now it is 50% faster.

Cortex now comes with the following product enhancements:

Collated Cortex Plugs: FastenMaster Cortex plugs are now available on a collated strip. This minimizes handling and saves valuable time on the jobsite.

Shorter & Faster Trim Screw: A new 2” fastener option delivers high levels of holding power but now offers versatility for applications such as deck fascia and exterior baseboards. The dual lead thread design spins the fastener 50% faster for quicker installs.

TORX® ttap® Drive System: This system is almost impossible to strip-out and the fastener is easily removed. The stability button keeps the fastener straight through installation.

Stronger Setting Tool: Optimized for extreme pro contractor use. Stronger bit material and industrial grade felt will enable you to install 350 fasteners on one Cortex Setting Tool.

Cortex Trim comes available in two fastener lengths 2” and 2-3/4". Each package comes complete with screws, plugs, and setting tools in a 50, 250 or 750 lin ft box.

Available in smooth or grained finish for the following brands:

AZEK® Trim
EX-Cel Trim
Koma® Trim
NuCedar Mills Trim
Trex® Trim
Versatex® Trim

Cortex Trim is also available directly from the following board manufacturers. For ordering information and stocking dealers, please click manufacturer links shown below to visit their websites.

CertainTeed Restoration Millwork®
Kleer® Trim
PALRAM Palight
Ply Gem PVC Trim
Royal S4S PVC Trim
Royal Celect Trim
Wolf® Trim

Don’t see your brand here? Call FastenMaster for a complete up-to-date listing.


Collated Cortex Hidden Fastening for PVC Trim with TORX ttap Drive System

The Cortex Hidden Fastening System is the fastest, easiest way to hide fasteners in PVC Trim boards. No more caulking, sanding or painting PVC trim. And it just got better!

Cortex Hidden Fastening System for PVC Trim

Learn how to install the Cortex Hidden Fastening System for PVC Trim.

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Drill Specifications

Install the Cortex for PVC Trim screws using an 18 volt cordless impact drill. Some suggested drills are:

Milwaukee 2650-22 1/4" Hex Impact Driver 18V

DeWalt DC822KL Heavy-Duty 1/2" (13mm) 18V Cordless Impact Wrench

Bosch Impact Driver

Trim Board Dimensions

Designed for use with PVC Trim with actual thicknesses of 5/8" to 5/4".

General Fastening Guidelines

  • 2” length for use in 5/8 through 5/4 PVC Trim Boards
  • 2-3/4” length for use in applications greater than 5/4

For horizontal trim boards less than 12" wide, use two Cortex fasteners at every framing member – rafter tail or wall stud. The screws should be 16" on center or closer. If you are attaching a vertical trim board (i.e., next to a door or a window) use two Cortex fasteners every 16" on center or closer.

If trim board is 12" or wider, use three screws. Each trim board must be fastened within two inches of the end of each board.


Predrilling is not required throughout the majority of the project. Predrilling is required when fastening within 1/2" of the end of a board and at mitered joints. Use a 3/16" drill bit for predrilled pilot holes.

Setting the Cortex Fastener

Use a cordless impact driver and the Cortex setting tool. Drive the Cortex fastener to the preset level below the PVC Trim surface. The Cortex screw must be driven perpendicular to the trim surface.

Cortex Tip: To remove a Cortex screw set below the trim surface, replace the Cortex setting tool in your impact driver with a #1 square drive bit. This allows full access to the seated screw.

Setting the Cortex Engineered Plug

To ensure a strong bond, the cored hole must be free of dirt or rain water.

Using Other Screws and Plugs

The Cortex System is designed to offer ultimate long term performance. The interaction between the PVC Trim, fastener and plug is essential. The Cortex connection is fully tested and warranted. Use of non-Cortex screw or non-Cortex plug will result in nullifying the FastenMaster warranty.

Technical Bulletins

FastenMaster technical bulletins are abridged versions of our TERs that demonstrate general guidelines and fastening patterns.

Warranty Information

Guarantee of Performance - 2013/6/24

This file contains information about Cortex for Trim product guarantee

Catalog Pages

Product specific pages from our FastenMaster catalog.

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