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USA Supply

Onslaught Fast-Cap Spider & Scorpion 16 oz Insecticide - for Indoor/Outdoor use, Long-Lasting Residual Control Against Scorpions, Spiders, and Other Insects

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$75.95 Why this price?

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As low as $12.66 / mo
  • – 6-month term
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Availability: In Stock.
Fulfilled by USA-Supply
Arrives within 30 days
Order within 1 hour and 8 minutes
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Features

  • Quick Knockdown and Residual Control: Onslaught FastCap Spider & Scorpion
  • Broad Spectrum of Pest Control: This insecticide targets a wide range of pests, including scorpions, spiders, and other insects listed on the label, making it a versatile solution for various pest infestations.
  • User-Friendly and Economical: Onslaught FastCap Spider & Scorpion Insecticide is designed to be easy to use, requiring minimal effort for application. It is also a cost-effective option, providing value for money with its efficient pest control capabilities.
  • Indoor and Outdoor Application: This product is suitable for use in both indoor and outdoor settings, allowing for comprehensive pest control in various areas. It can be applied to different surfaces and environments as directed by the label instructions.
  • includes: 16 oz of Onslaught FastCap Spider & Scorpion Insecticide & USA Supply protective gloves

Item Form: Liquid


Item Weight: 1.3 Pounds


Liquid Volume: 16


Brand: USA Supply


Target Species: Spider


Brand Name: USA Supply


UPC: 791101397655


Part Number: Fastcap


Model Number: Fastcap


Unit Count: 1.0 Fluid Ounces


Included Components: 1 bottle of Onslaught Fastcap and a pair of gloves


Manufacturer: USA-Supply


Item Form: Liquid


Target Species: Spider


Item Weight: 1.3 Pounds


Liquid Volume: 16


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good Spider Insecticide!
Worked really well compared to the other stuff you can buy at the local hardware stores. We've got terrible spider populations where we live and this stuff kept them at bay extremely well
Reviewed in the United States on January 12, 2026 by Amazon Customer
    • Great for killing Asian Beetles.
I did research on product to kill Asian Beetles and this was recommended. I have used it for 2 years now applying it every other month. The product works GREAT and is easy to use. I would highly recommend it! Kills Asian beetles, spiders and other bugs. Dries quickly.
Reviewed in the United States on October 26, 2025 by Graeme L. Norgard
    • Works well for scorpions
Scorpions are a major problem in Texas rural areas. This stuff kills them and lasts for months. Very impressed. Pricey but well worth it!
Reviewed in the United States on December 15, 2025 by Mick L
    • Scorpions
Haven't tried yet,but highly recommended.
Reviewed in the United States on September 13, 2024 by LM
    • Scorpion repellant
Good stuff for scorpions.
Reviewed in the United States on March 9, 2026 by Doug Y.
    • No need for an exterminator
This is what you need to spray as much or less as you want to control insects including scorpions. It is exactly what my exterminator company was using that I was paying a monthly payment on. Kick them to the curb and do it yourself. I bought this product and a pump sprayer. It works like a champ!
Reviewed in the United States on February 22, 2026 by Truth Review
    • Great pest control product
Works great we have major problems with scorpions and this has help. Was recommended by a professional pest control vendor who sprays our office building.
Reviewed in the United States on October 31, 2025 by Elise Bunnell
    • Works great
Amazing product. No spiders for over 8mos
Reviewed in the United States on August 3, 2025 by Jordallequinn

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