Murphy's Naturals
Mosquito Repellent Balm Stick
Balm · FIFRA 25(b) minimum-risk botanical repellent; not EPA-registered
Retailer links may earn us a commission. Scores are never affected.
Pros
- Nothing hidden and nice to carry: a beeswax and olive oil stick that goes on like a balm, no spray and no fumes.
Cons
- It barely works: the waxy base holds the oils against your skin instead of releasing them, so real protection is more like 6 to 12 minutes.
- The 2-hour reapply label oversells how long it actually lasts.
- Lemongrass oil at 3.25% carries a real sensitization risk, so patch-test before wider use.
The full review
Easy to carry and admirably open about what is in it, this balm stick still earns only a situational nod, because as a repellent it barely functions. A wax and beeswax base holds the botanical oils against the skin instead of letting them volatilize, so our model puts complete mosquito protection at roughly 6 to 12 minutes, with no proven tick coverage, and the effectiveness pillar all but bottoms out. The roughly 2 hour reapply interval on the label reads as an overpromise against how briefly it actually works, which our audit flags. Safety is the other drag, led by a high sensitization risk from lemongrass oil at 3.25% plus a pregnancy caution, so a patch test is wise. To its credit it is a fully disclosed FIFRA 25(b) formula that goes on cleanly with no spray or fumes.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%11Mosquitoes: 0.1–0.2 h of complete protection. Ticks: minimal or unproven protection. Protection times are modeled from the actives, concentration, and format (see methodology). Scored on a saturating curve (each added hour counts less than the last), 65% mosquito / 35% tick, with reasonable confidence.
Mosquitoes: 0.1–0.2 h of complete protection. Ticks: minimal or unproven protection. Protection times are modeled from the actives, concentration, and format (see methodology). Scored on a saturating curve (each added hour counts less than the last), 65% mosquito / 35% tick, with reasonable confidence.
Evidence & honest claims25%51Castor oil is well-supported by published evidence, weighted by how close its concentration is to the studied effective dose (base 56). Of 4 marketing claims audited: 2 strong, 1 moderate, 1 weak, 0 unsupported (-1). Labels a reapplication interval (~every 2 h) longer than its measured protection — an overpromise (−4).
Castor oil is well-supported by published evidence, weighted by how close its concentration is to the studied effective dose (base 56). Of 4 marketing claims audited: 2 strong, 1 moderate, 1 weak, 0 unsupported (-1). Labels a reapplication interval (~every 2 h) longer than its measured protection — an overpromise (−4).
Safety15%66From published dermal toxicology (EPA/CIR/IFRA), scaled by each active's concentration against its leave-on limit: high skin-sensitization risk from Lemongrass oil at 3.25% (−18); moderate irritation risk from Lemongrass oil at 3.25% (−6); caution advised in pregnancy (−6); moderate aquatic toxicity (−4).
From published dermal toxicology (EPA/CIR/IFRA), scaled by each active's concentration against its leave-on limit: high skin-sensitization risk from Lemongrass oil at 3.25% (−18); moderate irritation risk from Lemongrass oil at 3.25% (−6); caution advised in pregnancy (−6); moderate aquatic toxicity (−4).
Transparency15%96This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 71% of all ingredient concentrations (+11); the full formula including inerts is accounted for (+25).
This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 71% of all ingredient concentrations (+11); the full formula including inerts is accounted for (+25).
Every pillar is scored from published rules. Read how we score.
How long it protects
Complete protection ends when the first bite gets through; partial protection keeps reducing bites as repellency decays. EPA label times are verified; the rest are modeled from the actives, concentration, and format.
Mosquito estimate basis (low confidence)
Estimated complete protection time from active ingredient + concentration; the source research used a lotion-style formulation, matching this balm (no format adjustment). Partial protection (reduced but real bite suppression) is modeled to extend to ~0.4 h as repellency decays. No measured CPT below 10% for this active — estimated via sigmoid dose-response (×0.17 of Luker 2023 (10% lotion, CPT > 30 min)).
Tick estimate basis (low confidence)
Botanical actives show little to no reliable tick protection; reapply very frequently if used at all. On human-skin tick bioassays these oils protect for well under an hour and most show no significant protection versus an untreated control (Eisen 2024; Le Mauff 2024; Luker 2023).
Ingredient disclosure
This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 71% of all ingredient concentrations (+11); the full formula including inerts is accounted for (+25).
- Rosemary oilActive
Active repellent · 3.25%
- Castor oilActive
Active repellent · 10.5%
- Cedarwood oilActive
Active repellent · 2.0%
- Lemongrass oilActive
Active repellent · 3.25%
- Peppermint oilActive
Active repellent · 2.0%
- Beeswax
Inert / base · concentration not disclosed
- Extra virgin olive oil (organic)
Inert / base · concentration not disclosed
Claims audit
What the marketing says, versus what the evidence supports.
“DEET-free”
Deet FreeStrongStated on official brand page, Amazon 3-pack listing, and Walmart listing.
“Tested at New Mexico State University”
EfficacyModerateBrand describes human-volunteer arm-in-cage testing; study not independently published.
“Plant-based formula with no added fragrance or dyes”
NaturalStrongFull ingredient list is disclosed and botanical.
“Repels mosquitoes for up to 2 hours per application”
DurationWeakOverstates duration: complete (bite-free) protection is ~0.2 h and reduced/partial protection only to ~0.4 h; the claimed 2 h is not supported as complete protection.
Safe around dogs & cats?
Worst case from this product’s active ingredients. Do not apply this or any human repellent to your pet.
Mainly from Cedarwood oil, Lemongrass oil, Peppermint oil, and others.
Mainly from Rosemary oil, Cedarwood oil, Lemongrass oil, and others.
Not veterinary advice. Full guide to repellents around pets →