NSI Deck Mounts are the best.
The NSI adhesive mounts are bomber and the best option on the market for aftermarket adhesive tie downs for SUP boards. NSI tie downs work better than the standard after market plastic adhesive options for a few reasons. 1) The spectra loop allows you to use bungee cord or straps to cinch down your gear, which comes in handy if you want to bring along a cooler or just want a larger load to be more securely fastened to your deck. 2) The adhesive used on NSI Deck mounts does not come off, and once you put it on, it does not come and they are very secure and will not crack or break. 3) NSI deck mounts are much flatter and more streamlined than the hard plastic after market options that stick up much higher on your board and the plastic options will also scratch and mark up other hard surfaces, other boards, boats etc, whereas the NSI deck mounts are almost flat, and being rubber, will not damage or scratch other hard surfaces.