Forget about vinyl peel-and-stick numbers as they will not stick on Hypalon or PVC for long
. The vinyl numbers will stick alright but, be ready to install a new one after a few months or so especially if you fold your inflatable boat for stowing. Your best option is to buy glue-on numbers that were manufactured especially for inflatable boats. These glue-on numbers are available in most marine supply stores. Choose the appropriate color dark colored numbers for light colored boats and white colored numbers for dark colored boats. Installing them is easy as you just have to glue the numbers on the boat just like a repair patch.
However, glue-on numbers takes a lot or work as you need to prepare the fabric just like in repairing a patch. An easy way to number and name your boat is to paint them on the boat using a stencil kit. There are stencil kits available in marine stores. Some kits include primers while other kits have vinyl paint to be painted directly to the boat. The one with the primer kit is more permanent but you have to consider that the sides of the boat are not susceptible to the harsh environment of its bottom. It's your choice.
Inflatable boats need to be properly maintained and taken care of. If done properly, you can increase the life span of your boat twice as long as expected. If you take care of your inflatable boat, you save money in the long haul.
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