If you spend time on trails, in tall grass, or in your own backyard during the warm months, a tick repellent that actually holds up is worth getting right. The good news is that you do not have to choose between protection and a formula you feel comfortable wearing on your skin. This guide walks through what the CDC recognizes as effective against ticks, how to compare active ingredients like an informed buyer, and why a plant-based option built around 8% PMD from lemon eucalyptus earns its place next to the conventional picks.
The quick answer
The best tick repellent for humans is one with a CDC-recognized active ingredient, a clearly stated concentration, and tested protection hours you can rely on. Three actives meet that bar for ticks: DEET, picaridin, and oil of lemon eucalyptus (OLE), whose active compound is PMD.
If you want a DEET-free tick repellent that is still credentialed, our Bloc Off Spray uses 8% PMD from lemon eucalyptus, an active the CDC lists for tick and mosquito protection alongside DEET and picaridin. It is alcohol-free, water-based, and lab-tested for 6 or more hours of protection. For long grass or wooded outings, pair any skin repellent with a permethrin-treated layer on your clothing and gear, and build in tick checks afterward. That combination is what the CDC recommends, and it is what we build our products around.
What the CDC actually recognizes for ticks
There is a lot of noise in the repellent aisle, so it helps to anchor on the shortlist. For repelling ticks, the CDC points to a small set of active ingredients with the evidence behind them:
- DEET, the long-standing conventional benchmark.
- Picaridin, a synthetic active often chosen for its lighter feel.
- Oil of lemon eucalyptus (OLE) and its active compound PMD, the plant-derived option recognized at effective concentrations.
Permethrin belongs in the conversation too, but with an important distinction. Permethrin is applied to clothing, shoes, and gear, not to skin. It treats the fabric so ticks that make contact are affected before they reach you. We cover the skin-versus-clothing split in more detail below, because getting that right is one of the biggest practical upgrades to your tick protection.
Everything outside that shortlist deserves a closer look. Botanical blends without a stated active percentage, or products that lean on scent alone, may smell pleasant but rarely publish the testing to back a protection claim. That is the line we care about most.
How to choose a tick repellent that works
Once you know which actives are recognized, choosing between products comes down to three things you can check before you buy.
1. A stated active and concentration
The single most useful thing a label can tell you is exactly what is in it and how much. A repellent that names its active ingredient and its percentage is one you can actually evaluate. Vague "natural blend" claims with no concentration are the ones to be cautious about, because there is no way to weigh their protection.
Our Bloc Off Spray states it plainly: 8% PMD from lemon eucalyptus. That number is the point. It lets you compare our formula to any other option on an even footing.
2. Tested protection hours
Protection is measured in hours, and those hours should come from testing rather than a hopeful estimate. Look for a product that publishes how long it protects and under what conditions. Bloc Off Spray is lab-tested for 6 or more hours, which covers most day hikes, yard work sessions, and outdoor afternoons on a single application.
3. Formula feel and how you will use it
The best tick repellent for humans is also the one you will reapply without dreading it. Feel matters because it drives whether you actually keep protection on. Our formula is alcohol-free and water-based, so it goes on without the harsh sting or heavy residue some sprays leave behind. If you are packing light or traveling, the format you reach for matters too, which is why we offer both a spray and a wipe.
Comparing the recognized active ingredients
Here is how the CDC-recognized actives stack up at a glance. Concentrations vary by product, so always read the specific label.
| Active ingredient | Type | Recognized for ticks | Where it goes | Notes |
|---|---|---|---|---|
| PMD / OLE (8% in Bloc Off) | Plant-derived | Yes, at effective concentrations | Skin | DEET-free, our alcohol-free water-based pick |
| DEET | Synthetic | Yes | Skin | Long-standing conventional benchmark |
| Picaridin | Synthetic | Yes | Skin | Often chosen for a lighter feel |
| Permethrin | Synthetic | Yes | Clothing and gear, not skin | Treats fabric; complements a skin repellent |
The takeaway is that a DEET-free choice does not mean stepping outside the recognized options. PMD from lemon eucalyptus sits on the same shortlist as DEET and picaridin. The difference is that it is plant-derived, which is what draws people who want to avoid DEET without giving up the credential.
Why 8% PMD is the credentialed plant-based pick
Plenty of products market themselves as natural. Far fewer pair that positioning with a recognized active at a meaningful concentration. That gap is exactly where Bloc Off Spray lives.
The active is 8% PMD from lemon eucalyptus, the compound the CDC lists for tick and mosquito protection. It is the reason we can talk about protection with numbers instead of adjectives. The formula is alcohol-free and water-based, which keeps the feel light and the application comfortable. And it is lab-tested for 6 or more hours, so a morning application carries you through an afternoon outdoors.
For families, we designed the range to be usable by more of the household. Our brand testing supports use from 6 months of age. It is worth being precise here, because general EPA and CDC guidance advises against OLE and PMD products for children under 3. Our 6-month figure reflects our own product testing, and we flag the broader guidance so you can decide what fits your family. If you are outfitting more than one person, the Family Mosquito Protection Pack bundles the essentials for household coverage.
If you want to go deeper on how our formula compares to other DEET-free tick options on the market, our guide to the best DEET-free tick repellent breaks it down further.
Permethrin for clothing: the complement, not the substitute
One of the most effective moves for tick protection has nothing to do with what you put on your skin. Permethrin is applied to clothing, shoes, socks, and gear, where it treats the fabric itself. Ticks often climb up from grass and leaf litter onto your legs and feet first, so treated pants and socks give them a hard surface to cross before they ever reach skin.
Think of it as a two-layer approach. Permethrin handles your clothing and gear. A skin repellent like Bloc Off Spray handles the skin that clothing does not cover, such as your ankles at the sock line, wrists, neck, and hairline. Neither replaces the other, and used together they close the gaps that either one leaves on its own. Just remember the rule that keeps them straight: permethrin goes on fabric, never directly on skin.
How to apply for real protection
Even the best tick spray only works if it is applied the way it was tested. A few habits make the difference.
- Cover the exposed skin, not just a quick pass. Apply an even layer to arms, legs, ankles, and neckline. Ticks favor the lower legs and ankles, so do not shortchange them.
- Reapply within the tested window. For Bloc Off Spray, that means topping up around the 6-hour mark, or sooner if you have been sweating heavily or swimming.
- Do not forget the sock line and waistband. These are common entry points where ticks transition from clothing to skin.
- Keep a travel format handy. Bloc Off Wipes make reapplication easy on the trail, in the car, or at a campsite where a spray is less practical.
Tick checks: the habit that pairs with any repellent
A repellent reduces bites. It is not a force field, and the CDC is clear that no repellent replaces checking yourself after you have been outside. This is where the disease conversation belongs, kept brief and calm: the CDC notes that ticks can transmit illnesses such as Lyme disease, and that prompt tick checks and removal are part of reducing that risk. We are a repellent brand, not a medical one, so we will leave treatment questions to the professionals and stick to what we know.
The practical routine is simple. After time outdoors, check the warm, hidden spots ticks prefer: behind the knees, around the waistband, under the arms, along the hairline, and behind the ears. Check children and pets too. A shower shortly after coming inside makes unattached ticks easier to spot and wash away. Pairing this habit with a credentialed repellent is the combination the CDC points to, and it is the one we stand behind.
Which Superbloc product is right for you
- Everyday and backyard use: Bloc Off Spray is the main event, our 8% PMD formula with 6 or more hours of tested protection.
- Travel and on-the-go touch-ups: Bloc Off Wipes deliver the same active in a format that fits a pocket or glovebox.
- Households and families: the Family Mosquito Protection Pack bundles coverage for more than one person.
If you are also fighting mosquitoes on the same outings, one product covers both pests. Our breakdown of the best tick and mosquito repellent for 2026 explains how PMD earns its spot against both.
Frequently asked questions
What is the best tick repellent for humans? The best choice pairs a CDC-recognized active with a stated concentration and tested protection hours. DEET, picaridin, and OLE/PMD all qualify. If you want a DEET-free option, Bloc Off Spray uses 8% PMD from lemon eucalyptus, is alcohol-free and water-based, and is lab-tested for 6 or more hours.
Does a DEET-free tick repellent actually work? Yes, when it uses a recognized active at an effective concentration. PMD from lemon eucalyptus is on the CDC shortlist for ticks alongside DEET and picaridin. The key is choosing a product that states its active and percentage rather than relying on an unspecified botanical blend.
Is permethrin the same as a skin repellent? No. Permethrin is applied to clothing, shoes, and gear, not to skin. It treats the fabric so ticks are affected on contact. Use it to complement a skin repellent like Bloc Off Spray, not to replace it, and never apply it directly to skin.
Can I use Superbloc on kids? Our brand testing supports use from 6 months of age. Keep in mind that general EPA and CDC guidance advises against OLE and PMD products for children under 3, so review that guidance and decide what fits your family. The Family Mosquito Protection Pack is built for household use.
How often should I reapply? Bloc Off Spray is tested for 6 or more hours, so plan to reapply around that mark, or sooner after heavy sweating or swimming. Bloc Off Wipes make mid-outing touch-ups easy.
Last updated: 2026-07-06. Sources: CDC guidance on preventing tick bites and repellent active ingredients; The Superbloc product testing. By Tanya Lee, Co-Founder of The Superbloc, with Cassidy Huang, Co-Founder and Formulator.