Blue juice works incredibly well at sealing small leaks. If done correctly it gives a long-lasting repair that will get you back out paddling for many more sessions. The key is to make sure you track the fluid along the rail to the repair and get the board up to a high pressure so that it is forced into and through the leak to create a strong seal.
If you find that the board is still leaking after your first attempt, check that you have tightened the valve properly, as sometimes in your haste to get the board inflated you may not tighten this fully. Check out the video here https://vimeo.com/702785238 for a demonstration
