What is Hydrophobic?
Definition
Hydrophobic — Water-repelling. A hydrophobic surface makes water bead up and sheet off, carrying dirt with it. It's the headline property of ceramic coatings and many PPF topcoats, and the reason a coated car looks cleaner between washes.
Why it matters to a shop
It is the property customers actually see and judge you on, and the reason maintenance plans sell. Setting the expectation honestly — easier cleaning, not a self-cleaning car — is what keeps a delighted customer from becoming a warranty call.
Related terms
More from films & coatings — The products themselves — PPF, ceramic, tint and wrap vinyl.
- Paint protection film (PPF)A clear (or coloured) thermoplastic urethane film applied over a vehicle's paint to absorb rock chips, scratches and road debris. Also called a clear bra. Sold and installed by the linear foot off a roll, usually 60 inches wide.
- Ceramic coatingA liquid polymer (often silica/SiO₂-based) that cures to a hard, hydrophobic layer bonded to the paint or over PPF. It adds gloss and makes the surface easier to clean, but — unlike film — it does not stop rock chips.
- Self-healing filmPPF with an elastomeric topcoat that flows back to smooth when warmed, so light swirl marks and fine scratches disappear with heat from the sun or warm water. It repairs the topcoat only — not a deep cut through the film.
- TPU (thermoplastic polyurethane)The material modern PPF is made from. TPU is elastic, clear and abrasion-resistant, which is why it can be stretched over curves and (with the right topcoat) self-heal. It largely replaced older, more brittle PVC films.
- Vinyl wrapAn adhesive-backed vinyl film applied to change a vehicle's colour or finish (gloss, matte, satin, chrome, colour-shift) or to carry commercial graphics. Reversible, unlike paint. Cast vinyl conforms to curves; calendered vinyl is cheaper but flatter.
- Window tintA thin film applied to glass to reduce light, glare and heat. Common types are dyed (budget), carbon (no signal interference, better fade resistance) and ceramic (best heat rejection). Darkness is measured as VLT.
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