BOAT-COMPARATOR Guide
Hypalon or PVC: what the tube fabric really changes on a rental RIB
Two fabrics cover the tubes of rental RIBs, and they age very differently in the sun. What to know before comparing two listings that look identical.
Two RIBs of the same length, same engine, similar price: what actually sets them apart sometimes sits on the tube's fabric tag, not the engine spec sheet. The material wrapping the air chamber — PVC or Hypalon (CSM, chlorosulfonated polyethylene) — directly shapes how the boat holds up over time, and so the condition you'll find it in at the dock.
PVC, the most common fabric
This is the fabric fitted on most mainstream rental RIBs, especially newer fleets. Flexible, cheaper to produce and easy to patch, it offers excellent value on a boat used for a few seasons before being replaced — the typical case for a professional rental fleet.
Hypalon, the choice for fleets that live outdoors year-round
More expensive to manufacture, Hypalon resists UV exposure better over time and keeps its flexibility longer under permanent outdoor use — which is why it turns up on yacht tenders and some premium RIBs left at anchor or on a berth all season rather than stored dry between rentals.
What actually wears a tube out
In both cases, prolonged UV exposure degrades the fabric well before everyday mechanical wear does: a study on the ageing of outdoor PVC-coated fabrics by Dobilaitė, Jucienė, Bliūdžius and Šveikauskaitė, published in the Journal of Industrial Textiles in 2022, measured how cumulative UV exposure reduces the coating's tear strength before the textile structure itself is affected (see the study on Google Scholar). On a rental tube, that translates directly: it's the sun accumulated over the boat's whole life, not your one day out, that determines its condition — a good reason not to leave a RIB baking at anchor in full sun without need.
What to check at departure, whatever the fabric
- Tube pressure, firm under thumb pressure without being soft — an under-inflated tube wears the hull bottom.
- No sticky, cracked or discoloured patches, often the first sign of a repair to come.
- Seams and welds, a more common weak point than the fabric itself on a well-maintained boat.
What it means for your booking
Nothing disqualifying: a well-maintained PVC RIB from a serious operator performs just as well as a pricier Hypalon model. The tube's fabric rarely appears in the listing itself — it's the overall condition noted at the departure check-in that should guide your attention, as detailed in our complete guide to renting a RIB.
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