The DEET Spray British Travellers Keep Re-Buying, Oily Catch and All

Pyramid Trek 50 carries 50% DEET, the strongest concentration you are legally allowed to buy in the UK, and that single number is the whole reason people pick it. The reviews are full of travellers who say they came home from mosquito country without a mark on them, from a Serengeti safari to two months in South East Asia.

It is not a spray people dislike. It is one they re-buy for years, but two specific gripes keep surfacing in the 100 most-recent reviews: it is oily, and the bottles can leak in transit. Both are worth knowing before you pack it for a trek, a festival or a midgy week in Scotland, and both are easy to plan around.

First, the thing it actually gets right: bites

Strip away the packaging gripes and the texture moans, and the core job gets done. In the 100 most-recent reviews, the single most common line is some version of "I didn't get bitten." Julie T applied a few squirts to her ankles and wrists in Lanzarote and reported she "didn't get bitten once." Louise Bass, who describes herself as "a person who gets bitten to death," came back from a 10-day Serengeti safari with just two bites, both on a hand she kept washing. Patrick managed a single bite across two weeks in the Caribbean.

The pattern holds across very different destinations: Thailand, Vietnam, Egypt, Costa Rica, East Africa, Greece, even Lake Garda. One reviewer, Mcrayman, summed up the appeal of the high concentration plainly after a Thailand trip: "With 50% DEET it's strong, but it did exactly what I needed it to do and kept the bites away, even in the evenings and more humid areas." That is the trade most buyers are making, a bit of strength and oiliness in exchange for being left alone.

It is not unanimous, and we will get to the people it failed. But the weight of recent reviews lands on effective, and for a repellent that is the only stat that really matters.

Catch one: it is oily, and that is the price of admission

This is the most-repeated criticism in the sample, and you should expect it rather than be surprised by it. A handful of the 100 most-recent reviewers mention an oily or greasy feel. Richard gave it four stars but warned it is "terribly oily and leaves marks on white T-shirts." One three-star reviewer, max, called it "extremely oily." Another flatly described it as "oil and not cream" that "doesn't rub in."

Here is the twist: plenty of people do not mind, and a few even like it. Isha said "it's a little oil, so I almost use it as a moisturiser too." Mike of Wembley described it as "a bit greasy when first applied" and still gave five stars because in two weeks he got "only a couple of bites." Several reviewers found the oiliness is exactly what lets them rub it in for even coverage rather than relying on the spray alone.

The practical takeaway from the reviews: treat it as a rub-in repellent, not a dry-touch body spray. Reviewers describe spraying it on, rubbing it in and letting it soak in a little before getting dressed, and keeping it off good light-coloured clothing. Julie T did exactly that in Lanzarote and found that "once soaked in wasn't sticky." If you want something that disappears instantly on the skin, look elsewhere. If you want strength and do not mind a slick finish, this is the trade.

Catch two: check the bottles the day they arrive

The second recurring complaint has nothing to do with the formula and everything to do with the packaging in transit. Eight of the 100 most-recent reviewers reported a bottle that leaked, usually on the way to them. Anna had "both bottles leaked." Chi found it "keeps leaking and made a mess in my suitcase." Dave P had to return his first delivery after it "leaked into the packaging during transit," though his replacement "arrived perfectly and worked perfectly on holiday in Goa."

That last point matters. Several leak reports are paired with a working second bottle, so this reads as a seal and shipping quality-control issue rather than a product that cannot hold liquid. Lynnie B kept hers "carefully double bagged at all times just in case" and still rated it four stars because the spray itself worked on safari. swordfishradio was less forgiving, noting "the seals on the bottle were bubbled."

Two things make this easy to live with. First, the 100ml usually ships as two 50ml bottles, as buyer Johnny Trearty confirms, so a single leaker does not wipe out your whole supply. Second, open the package the moment it lands, check both seals, and if one is weeping, start a return straight away rather than discovering it mid-suitcase. Pack it in a zip-lock bag for travel regardless. It is an annoyance to plan around, not a reason to skip the product.

Where 50% DEET actually earns the strength

You do not need 50% DEET for a beer-garden evening in June. Where the high concentration pays off is exactly where the listing aims it: tropical and sub-tropical travel where biting is relentless and reapplication is constant. Reviewers used it across Central and South America, sub-Saharan Africa, South East Asia and the Indian subcontinent, and that is the right context for a spray this potent.

One regular traveller, Victor Meldrew Mk2, explained why concentration matters on a long trip: it "comes in at the maximum recommended strength of 50% which is essential for prolonged use," and he is right that strength buys you longer, more reliable cover when you are out from dusk to dawn. The listing claims up to 6 hours of protection, and most reviewers found a single application carried them through an evening. A couple noted that heavy sweating thins the cover, so an active day may need a top-up.

Closer to home it still has a job. Terence rated it for "keeping the little midges away," which is the menace that ruins a Scottish or Lake District trip far more often than mosquitoes do. One UK reviewer even reported flying ants keeping their distance after a spray. For a damp British pitch in midge season, 50% is overkill in the best way, you will use less of it and reapply less often than a weaker spray.

Skin, eyes and the age-12 line

A repellent this strong is not for everyone or every age, and the reviews include the small minority who reacted to it. A handful of recent reviewers described a skin reaction: one said her skin "went red and felt hot" on application, another found it "incredibly strong and irritating," and a third reported a reaction across two people from what she suspected was a bad batch. These are the exception across 5,055 ratings, but if your skin is sensitive, patch-test a small area before you coat your legs.

This product is rated for adults and children aged 12 and over, not for younger kids or babies, so it is the wrong choice for a family with toddlers in tow. DEET also needs respect around your face: several five-star reviewers who love the spray still warn to keep it away from your eyes, and one buyer caught a faceful spraying in poor light on a dark balcony. Spray in good light, point it away from your face, and rub it in with your hands for the head and neck rather than misting upward.

None of this is unusual for a 50% DEET product. It is the standard trade-off for the strongest legal concentration, and the listing is upfront that this is grown-up kit. Treat it as such.

The warning that runs through the five-star reviews: what DEET dissolves

This is the detail worth tattooing on the bottle. DEET is a solvent, and reviewers report it doing solvent things to certain plastics and coatings. The reviews are weirdly entertaining on this point and also a useful heads-up. One reviewer, duckapluck, watched it "dissolve my fitflops off me feet in 2 hours." Ruby was alarmed when "it melted my nail polish." DJ DEMON cautioned to "spray it on outdoors, or it will make your hard or tiled floor slippery."

So before you go waving it around, take the hint from those reviewers: keep it off sandal straps, painted nails and glossy surfaces, and spray outdoors onto skin rather than over your kit or a tiled bathroom floor. Let it dry a little before you handle phones or touchscreens. This is not a flaw unique to this brand, it is simply what concentrated DEET does, but the strength here makes it more noticeable than a 20% spray would be.

Handled sensibly it is a non-issue. It just rewards a moment of thought about what is downwind of the nozzle.