Another option would to use pool noodles and a couple of tie straps.
How to secure a kayak on roof rack.
With sit on tops you will probably have scupper holes where you can thread the cable allowing you to then secure it to your roof rack.
Secure the kayak straps.
A cable lock can be ideal for locking your kayak and securing it onto your roof rack.
Place your kayak or canoe on the roof rack.
Lay the kayak straps over the bars of the roof rack.
How to transporting without a roof rack how to lock a kayak to the roof rack of a vehicle.
Tie the straps down with cam buckles to secure the kayak.
How to strap a kayak to a roof rack.
Choose a kayak carrier.
The right kayak carrier for you depends on the size weight of your watercraft how many.
Bring the canoe straps over the canoe.
Tie on to a rack in two places then secure the bow and or stern via the hood system see long boat short car above and securing the stern with a line tied to d rings in the bed.
Just be extra careful when backing up.
If you have a short cab and you must you can lay you kayak flat in the bed using a tailgate extender to support the stern.
Kayak roof rack step 1.
To tie down a kayak place it right side up on your roof rack and center it.
The easiest way most secure way to haul your kayak around is to purchase a universal soft roof rack system.
Lay the straps over the roof rack bars.
Run 2 boat straps over the top of the kayak and them under the roof rack bars then bring the straps to the other side of the kayak and loop them under the roof rack bars on that side.