Polyurethane Boats Is Air-filled PVC Pipe Better Than Polyurethane Foam Filled-PVC For Raft Boat? If No, How To Integrate It?

Is air-filled PVC Pipe better than Polyurethane Foam filled-PVC for Raft Boat? If no, how to integrate it? - polyurethane boats

I want to build a raft with local storage tubes, I'm half American living in northern Africa (my father is American Engineering Corp. WW2, but I live) from my mother.

I implore 800 kg equipment and Gill! (sorry my budget does not allow highly-integrated, take a boat to around 70 cm depth of water at 22 ° C to work 300 meters from the beach) to build from. It is the emphasis on safety lool.

So what's diameter?
As for the building?
What to do with the right color to do?
And your work and physical polyurethane chemistry?

Any serious advice (please avoid the style, I made a friend, a raft condomnes as recycling) has, in fact I am condommne disadvantages.

Best regards

Rachidy Yakin