No more cleaning out debris from the tailgate gap.
When the tailgate is closed ROK BLOCK^®folds into the tailgate gap, doubling as a tailgate seal.
To keep out dust and water from entering in through the sidewalls, when using a truck bed cap or tonneau cover, install our patented
Tailgate Seal with Taper Seal®.

Adheres to vehicle using 3M ST1200 adhesive. 15 minute installation.

ROK BLOCK^®comes in two different widths: 4.25" and XL 7"*.
Watch how to install our ROK BLOCK XL on Ford F450 on YouTube

Excluded Pickups: Ford with Pro Access Tailgate, Honda Ridgeline with Dual Action Tailgate, Hyundai Santa Cruz, RAM with Multifunction Tailgate and Tesla Cybertruck

Use7" ROK BLOCK^® XL for the following trucks: Chevrolet Silverado, Chevrolet Colorado 2023 and newer, 2019 and newer Ford Ranger, 2021 and newer Ford F Series trucks with a hinge retainer bracket, Ford Lightning, GMC Sierra, GMC Canyon 2023 and newer, Nissan Frontier, RAM 2500 and 3500 and all trucks / utes outside of the U.S. market.

NOTE: For Ford F150, F250, F350 and F450 (except 2021 and newer F Series with a hinge retainer bracket) it's recommended to use 4.25" width ROK BLOCK.

©2008 Extruded Solutions, Inc. ROK BLOCK® is a registered trademark of Extruded Solutions, Inc. West Chicago, IL. Patent No.  US D1,026,791 S
Updated: October 2025