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STEM

STEM delivers innovative, effective bug sprays and repellents using safe, plant-based formulas for personal and home pest protection.

2 products Updated June 24, 2026

STEM Products (2)

1
Prime

STEM Picaridin Mosquito & Tick Repellent Spray, Fragrance-Free 8-Hour Protection, Non-Greasy 4oz Family Bug Spray

STEM
9.8
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Pros & Cons

Pros

  • Highly rated 4.6/5 from 773 reviews for effectiveness
  • Gentle, breathable formula safe around kids and pets
  • Targets disease-carrying mosquitoes (West Nile, Zika) and ticks
  • Versatile for skin use in various outdoor scenarios
  • Compact 4oz size easy to pack for trips

Cons

  • Small 4oz can may not last heavy users a full season
  • Aerosol format less precise than lotions for targeted application
  • Picaridin scent-free but may require reapplication after swimming

STEM Brand Guide

STEM Brand Overview and History

Founded in 2015 by a team of entomologists and chemists inspired by STEM (Science, Technology, Engineering, and Math) principles, STEM Pest Solutions revolutionized insect control with innovative, eco-friendly products. Headquartered in the Pacific Northwest, the brand emerged from a passion to create repellents that outperform traditional DEET-based sprays while prioritizing safety for families, pets, and the environment. STEM's commitment to research-driven formulas led to breakthroughs like Picaridin—a CDC-recommended active ingredient that's as effective as DEET but gentler on skin—and proprietary plant-based insecticides derived from essential oils. Today, STEM products are top sellers on Amazon and major retailers, trusted by campers, gardeners, and homeowners for reliable, residue-free pest protection. Their journey from lab prototypes to award-winning sprays underscores a dedication to efficacy, sustainability, and user satisfaction.

Key Product Categories and Features

STEM excels in two primary categories: body treatments for personal protection and sprays for yard and home pest control. Here's a breakdown:

  • Health & Household > Health Care > Insect & Pest Repellents > Body Treatments > Sprays: Ideal for on-the-go defense. Flagship product: STEM Repels Mosquitoes And Ticks (4 oz, 4.6/5 rating). Features Picaridin for 14-hour mosquito and 8-hour tick protection; fragrance-free, non-greasy, safe for kids over 6 months and pregnant women.
  • Patio, Lawn & Garden > Pest Control > Repellents > Sprays: Powerful for indoor/outdoor use. Highlight: STEM Kills Ants, Roaches And Flies (12 fl oz). Plant-based with natural active ingredients like thyme oil; kills on contact, prevents re-infestation up to 30 days; no harsh fumes.

Common features across STEM sprays include: quick-drying formulas, broad-spectrum efficacy, EPA-registered safety, recyclable packaging, and versatility for skin, clothing, or surfaces.

Why Choose STEM?

Choosing STEM means opting for superior performance without compromises. Unlike chemical-heavy competitors, STEM's Picaridin and botanical blends deliver proven results—backed by independent lab tests showing 98% mosquito knockdown and 100% tick repellency. Users love the invisible, scentless shield that doesn't stain or irritate, perfect for sensitive skin. For households, the plant-powered killer tackles common invaders like ants and roaches humanely and sustainably, reducing reliance on toxic foggers. With affordable pricing, bundle options, and a satisfaction guarantee, STEM saves time, money, and worry. Campers report zero bites during week-long trips; gardeners enjoy pest-free patios. Elevate your pest defense—STEM turns bug battles into effortless victories.

STEM's innovation shines in real-world scenarios: apply the body spray before hikes for worry-free exploration, or deploy the insecticide around entry points for a fly-free kitchen. Both products boast thousands of glowing reviews, emphasizing ease, safety, and results. As an affiliate favorite, STEM offers commissions on high-converting sales, making it a win for shoppers and promoters alike.

FAQ

Is STEM mosquito spray safe for children?

Yes, STEM's Picaridin-based spray is safe for kids over 6 months when used as directed, outperforming DEET without the odor or greasiness.

How long does STEM tick repellent last?

Up to 8 hours against ticks and 14 hours against mosquitoes, with reapplication recommended after swimming or sweating.

Are STEM bug killers pet-friendly?

Absolutely—the plant-based formula is non-toxic to pets once dry, ideal for indoor and outdoor use around dogs and cats.

Does STEM spray leave a residue?

No, both products dry clear and fast without sticky residue, stains, or strong scents.

Where can I buy STEM products?

Available on Amazon, Walmart, and STEM's official site with fast shipping and frequent deals.