UV and salt water resistance films – Technical Guide
The durability of a boat foil depends greatly on its resistance to UV radiation and salt water. Find out the technical details.
1. UV resistance
What is UV radiation?
UV radiation (ultraviolet) is a form of radiation emanating from the sun. It consists of three types:
- UVA: Long wavelength, causes fade
- UVB: Medium wave, causes damage
- UVC: Shortwave, filtered by the atmosphere
How do films protect against UV?
High-quality boat films have several UV protective layers:
- UV absorber: Chemicals which absorb UV radiation
- UV-Blocker: Pigments which reflect UV radiation
- Stabilisatoren: Prevent oxidation and fade
- Protective layer: Transparent layer over the film
UV resistance by film type
| Folientyp | UV protection | Fade after 10 years |
|---|---|---|
| Premium Cast Vinyl | Excellent | <5% |
| Polyurethan (PU) | Excellent | <3% |
| Calendered Vinyl | Gut | 10–15% |
| Budget-Folie | Resources | 20–30% |
2. Salt water resistance
What is saltwater?
Salt water contains dissolved salts (mainly sodium chloride) and is extremely corrosive. It causes oxidation, yellowing and material degradation.
How do films protect themselves from salt water?
- Watertight adhesive layer: Prevents water penetration
- Corrosion protection: Chemical barrier against salts
- Surface treatment: Sealing of the edges
- Selection of materials: Saltwater resistant plastics
Salt water resistance by film type
| Folientyp | Saltwater protection | Yellowing after 10 years |
|---|---|---|
| Premium Cast Vinyl | Excellent | <3% |
| Polyurethan (PU) | Excellent | <2% |
| Calendered Vinyl | Gut | 8–12% |
| Budget-Folie | Resources | 15–25% |
3. Combined load: UV + salt water
The combination of UV radiation and salt water is particularly harmful. It causes:
- Accelerated oxidation
- Faster fade
- Material embrittlement
- Adhesive degradation
4. Maximising durability
Proper choice of materials
Use high-quality materials with proven UV and salt water resistance.
Professional application
A thorough surface preparation and professional application are crucial.
Regular care
Monthly cleaning and annual sealing significantly extend the service life.
Sun protection
For prolonged storage, use a boat cover to reduce UV exposure.
Examples of our wrappings projects
Frequently asked questions
Technical conclusions
High-quality boat films (cast vinyl, polyurethane) offer excellent UV and salt water resistance. With professional application and regular care, they last 10-12 years or longer.