DEET vs Picaridin in Spain
The two most-recommended mosquito-repellent actives for Spanish summers — including the increasingly aggressive day-biting tiger mosquito (Aedes albopictus). Both work; the choice comes down to skin feel, kids, and what you are doing.
Quick Verdict
Pick Picaridin (Icaridin) if you have children over 2 months, are around fabrics/electronics, or hate the greasy feel of DEET. Equivalent protection, easier life. Pick DEET if you are in a high-mosquito zone (Ebro delta, marismas, late-evening hikes) where maximum protection duration matters and you can wash hands well afterwards. IR3535-based products are a third option for very sensitive skin.
Side-by-Side
| Criterion | DEET (e.g. Relec Extra Fuerte) | Picaridin / Icaridin (e.g. Autan) |
|---|---|---|
| Typical concentration in Spanish products | 30–50% | 10–20% |
| Protection duration | 5–6 hours (DEET 30%) | 4–5 hours (Picaridin 20%) |
| Skin feel | Greasy, can sting if applied to broken skin | Non-greasy, neutral |
| Damages plastics/synthetic fabrics | Yes (watch faces, sunglasses, rain shells) | No |
| Safe for children | From 2 months at ≤30% | From 2 months at ≤20% |
| Pregnancy safety | Considered safe (CDC/WHO) | Considered safe (CDC/WHO) |
| Sunscreen interaction | Reduces SPF 30-40% | Minimal interaction |
| Effective vs tiger mosquito | Yes | Yes |
| Price (100ml) | €8–12 | €10–15 |
Which to Pick by Situation
Beach day with kids
Picaridin — sunscreen friendly, non-greasy, no plastic damage on goggles/floats.
Evening terrace dinner
Either — short exposure, tiger mosquitoes day-biting tapering off. Picaridin slightly nicer.
Hiking the Picos / Pyrenees
DEET — longer protection on multi-hour activity; also stronger against horse flies and ticks.
Sensitive skin / eczema
IR3535 (third option) — gentler than both; many Spanish farmacias stock IR3535-based products.
See our complete mosquito guide for Spain and the best Spain-available mosquito repellent products with current Amazon.es pricing.
Frequently Asked Questions
Is DEET or Picaridin better against Spain tiger mosquitoes?
Both work well against Aedes albopictus (tiger mosquito). Head-to-head field studies in Mediterranean conditions show DEET at 25-30% concentration and Picaridin at 20% give roughly equivalent protection time (4-6 hours). The main differentiator is skin feel and fabric compatibility — Picaridin is non-greasy and does not damage plastics or synthetic fabrics; DEET can melt some plastics and synthetic gear.
Is Picaridin safer than DEET for kids in Spain?
Spanish health authorities (AEMPS) and the WHO consider both safe when used at recommended concentrations. Picaridin is preferred for children under 12 because of its softer skin profile and absence of the rare irritation cases reported with DEET. Avoid both on infants under 2 months; use mosquito nets and physical barriers instead. From 2 months, products at lower active concentrations (10% Picaridin or under) are appropriate.
Where can I buy DEET and Picaridin repellents in Spain?
Both are widely available in Spanish pharmacies (farmacias), supermarkets (Mercadona, Carrefour, El Corte Inglés), and on Amazon.es. The most common DEET-based brand is Relec Extra Fuerte (50% DEET); the most common Picaridin brand is Autan Family Care (Icaridin 20%). Most Spanish farmacias also stock IR3535-based options as a third alternative.
How often should I reapply DEET or Picaridin in Spain?
Reapplication interval depends on concentration and conditions. DEET 30% lasts 5-6 hours in moderate heat; sweating or swimming reduces this to 2-3 hours. Picaridin 20% lasts 4-5 hours similarly. Reapply after swimming, heavy sweating, or every 4 hours during peak mosquito activity periods (dawn and dusk for most species; throughout the day for tiger mosquitoes).
Can I use DEET with sunscreen in Spain?
Yes, but the application order matters. Apply sunscreen first, let it absorb for 15 minutes, then apply DEET. DEET reduces sunscreen SPF by 30-40% when mixed, so reapply sunscreen more frequently. Combination products exist but are generally less effective than applying separately. Picaridin has less interaction with sunscreen, making it easier to layer on beach days.