I think the blower would be enough to inflate a rubber boat or to "pre-inflate" a SUP. However, I am sure it is too weak to bring the pressure into the SUP afterwards. After all, it is "only" a blower and not a compressor.
Hello Sir, Basically, it's a blower that replaces a compressor. But I've seen videos of people using it to inflate inflatable boats. I don't think it will cause any problems for your paddle.