## Common ground
Both options refer to plastic-based materials used for covering walls or ceilings, primarily made from PVC.
## Options at a glance
**3916.20 – Polymer of vinyl chloride**
- **Defining trait:** Made from raw vinyl chloride polymer, typically in sheet or roll form without adhesive backing.
- **Typical examples:** PVC wall panels, ceiling tiles, flexible sheets for cladding.
- **Best fit when:** The product is a solid, non-adhesive sheet or roll used for covering surfaces via mechanical fastening or framing.
**3919 – Self-adhesive plastic sheets/foils**
- **Defining trait:** Has an adhesive layer on one side, designed to stick directly to walls or ceilings without additional fixings.
- **Typical examples:** Peel-and-stick PVC wall coverings, adhesive-backed ceiling films, decorative vinyl wraps.
- **Best fit when:** The product is applied by peeling off a backing and sticking it directly to the surface.
## Key differences
| Feature | 3916.20 – Polymer of vinyl chloride | 3919 – Self-adhesive plastic sheets |
|-----------------------|-------------------------------------|-------------------------------------|
| Adhesive layer | No | Yes |
| Installation method | Mechanical fixing or framing | Direct adhesion |
| Common form | Sheets, rolls | Sheets, strips, tapes |
## How to choose
- Does the product have a sticky backing? → 3919
- Is it installed using nails, clips, or frames? → 3916.20
## Overlaps & pitfalls
A PVC covering may be both a vinyl chloride polymer *and* self-adhesive, especially if it’s a peel-and-stick sheet made from PVC. In such cases, **3919 takes priority** because the adhesive feature is the defining characteristic for classification under customs rules. If unsure, prioritize the product’s primary installation method: adhesion vs. mechanical fixings