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Old 31 October 2004, 10:35   #1
Country: Netherlands
Length: 5m +
Join Date: Jul 2004
Posts: 72
What Tube material to use ?

Hi, I am looking to have new tubes installed on my Rib.
they always told me to go with Hypolon, but there are so many different other product out there that say they are stronger.
What do you think I am doubting between Hypolon or PU ( military spec polyurethane).

Thanks in advance,


stingraymax is offline   Reply With Quote
Old 31 October 2004, 12:19   #2
Country: Ireland
Town: Carigaline/Baltimore
Boat name: XS-600
Make: XS-Ribs
Length: 6m +
Engine: Merc Optimax 150 XL
Join Date: Feb 2004
Posts: 682
I would go with PU, but thats just my own preference and I'm biased as my RIB has PU tubes. Been discussed many times here before so do a search. Beware though as a lot of the threads on here confuse PU with PVC. The only similarity is that both fabrics can be heat welded. PVC is an unstable polymer because of the chemical make up of the fabrics coating. This means that the PVC fabric is constantly changing, oxidizing and migrating to the surface. PVC's are liquefied with solvents where polyurethane is liquefied by heat, leading to a significantly more stable fabric coating. Stories about tubes rotting in the sun are about PVC - not polyurethane.

I think you'll find that a read of the following web page should shed some light on the issue:

Note the US Navy test at the end of the page which recommends that hypalon ribs should be replaced with polyurethane tubes. I don't think this caught on with the US Navy, probably preferring to stick with hyplaon as it is easier to glue and any Dummy can do it!!
Steve G
If In Doubt, Go Flat Out!!
swginn is offline   Reply With Quote

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