Why not just go the cheap but just as effective way as I have. When I need to make the kayak secure on the rack, I just loop a cable lock around the kayak and rack. I also have a u-bolt epoxied into the hull just behind the cockpit through which the cable lock can be run. If anyone is determined enough to want to steal my kayak once locked up, no expensive fancy pants metal-reinforced webbing is going to stop them. Tin snip can most likely easily cut through the reinforced webbing. Course, bolt cutters can do the same thing to my cable lock as well. Nothing beats paranoid sleep patterns when the kayak is left out on top of the car: the slightest noise and I am up peeking through the curtains.

Robert N Pruden