PVC vs Hypalon
A technical comparison of durability, UV resistance, repairability, weight, and cost between the two dominant materials used in professional inflatable boat manufacturing.
Material Overview
PVC (Polyvinyl Chloride)
PVC is a thermoplastic polymer used extensively in inflatable boat manufacturing. For marine applications, it is typically reinforced with a polyester scrim (1,100 – 1,680 DTEX) and coated on both sides. Modern marine PVC formulations include UV stabilizers and plasticizers to improve flexibility and weather resistance.
Advantages: Lower cost, easier to weld (RF or hot air), lighter weight, wider color range, better cold-weather flexibility.
Hypalon (CSM – Chlorosulfonated Polyethylene)
Hypalon is a synthetic rubber compound (now produced generically as CSM after DuPont discontinued the Hypalon trademark). It is renowned for exceptional UV and ozone resistance, making it the preferred material for professional and military-grade inflatable boats that spend extended periods in direct sunlight.
Advantages: Superior UV/ozone resistance, higher abrasion resistance, better chemical resistance, longer lifespan in harsh sun.
Side-by-Side Comparison
| Property | PVC | Hypalon (CSM) |
|---|---|---|
| UV resistance | Good (with stabilizers) | Excellent (inherent) |
| Abrasion resistance | Good | Very good |
| Tensile strength | 3,000 – 5,000 N/5cm | 2,500 – 4,000 N/5cm |
| Weight (per m2) | 850 – 1,200 g | 1,100 – 1,500 g |
| Cold flex (low temp) | -30°C | -20°C |
| Repairability | Easy (heat weld or adhesive patches in solvent adhesive) | Requires special CSM adhesive and proper surface preparation |
| Joining method | RF welding, hot air welding | Hand gluing (contact cement) |
| Cost (material) | $8 – $15 / m2 | $20 – $40 / m2 |
| Lifespan (tropical sun) | 5 – 8 years | 10 – 15 years |
| Color retention | Moderate (may fade) | Excellent (minimal fading) |
Which Should You Choose?
Choose PVC When:
- Budget is a primary concern
- The boat will be stored out of direct sunlight (garage, covered dock)
- Weight matters (PVC is 15 – 25% lighter)
- You need cold-weather flexibility below -20°C
- You want a wider range of color options
Choose Hypalon When:
- The boat will be moored or stored in direct sunlight
- You are in a tropical or high-UV environment
- Maximum durability and lifespan are the priority
- You are equipping professional or commercial fleets
- Abrasion from sand, concrete, or docks is a concern
Manufacturing Differences
PVC boats are manufactured using RF (radio frequency) welding or hot air welding, which creates a molecular bond between the coated fabric layers. This allows for automated, consistent production with high throughput.
Hypalon boats are assembled using hand-gluing with contact cement. Each seam is manually rolled and pressed. This makes Hypalon production more labor-intensive and less consistent, but the resulting seams are highly durable when properly executed.
Aquafarer Recommendation
For most recreational users, modern high-quality PVC with UV stabilizers offers the best balance of cost, weight, performance, and durability. Aquafarer uses 1,680 DTEX marine PVC with a three-layer coating for its consumer and OEM product lines. For commercial and government clients requiring extended UV exposure, we offer Hypalon fabrication on request.