Cast vs. Calendered: Which film is right for your boat?
Not all films are the same – and choosing the right material will determine the durability, appearance and ultimately the value of your investment. In this guide, we explain the crucial difference between cast and calendared films and provide clear recommendations for different use cases.
What is a Calendered film?
Calendered film (also called “calendering film”) is produced by a rolling process: PVC mass is rolled to the desired thickness by heated rolls (calenders). This process is inexpensive and fast, but leaves an internal tension in the material – similar to a rubber band that has been stretched.
This internal tension has practical consequences: Calendered films tend to contract over time, especially at edges and curves. They are thicker (80–100 microns) and less flexible than cast films.
Calendered film at a glance:
- ✓ Cheaper price (20-30% cheaper than cast)
- Good for flat, simple surfaces
- tends to shrink at edges
- Less flexible with complex hull shapes
- Shorter service life: 3–5 years
What is a Cast Film?
Cast film (also called cast film) is produced in a completely different process: liquid PVC is poured onto a backing tape and then cured. This process is more complex and expensive, but produces a foil without internal tension – it does not “remember” its original shape.
The result is a significantly thinner (50-70 micron), highly flexible foil that adapts perfectly to curves, arches and complex three-dimensional hull shapes. Cast films do not shrink and retain their shape permanently.
Cast film at a glance:
- ✓ Maximum flexibility for complex hull shapes
- ✓ No shrinking at edges and curves
- ✓ Long-lasting: 7–10 years
- ✓ Better UV resistance and color stability
- Higher price (20-40% more expensive than Calendered)
The direct comparison
| Characteristic | Cast-Folie | Calendered film |
|---|---|---|
| Production method | Casting (cast) | Rollers (calendering) |
| Dicke | 50–70 microns | 80–100 microns |
| Flexibility | Very high | Resources |
| Shrinkage | No shrinkage | Tends to shrink |
| Durability | 7–10 years | 3–5 years |
| UV resistance | Very high (5–10 J). guarantee | Means (3–5 J). guarantee |
| Suitable for curves | Ja, ideal | Bedingt |
| Preis | Higher (+20–40 %) | Cheaper |
| Recommendation for boats | ✓ Recommended | For flat surfaces only |
Recommended manufacturers
We only use premium films from manufacturers known for their quality and durability:
Our recommendation
For boat wraps we generally recommend cast films. Boats have complex hull shapes with curves, curvatures and narrow radii – this is where Calendered film fails in the long term. The additional costs for cast film are amortized by the significantly longer service life.
Calendered film can be useful for: temporary labels, flat interior surfaces in the cockpit or budget projects with a short service life. For everything else – and especially for the hull – the following applies: Cast film is the better investment.
Which film fits your boat?
We advise you free of charge and recommend the optimal material for your application.
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