Onslaught FastCap Spider and Scorpion Insecticide

$56.50 - $397.71

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4.5 out of 5 stars Rating: 4.7

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Onslaught FastCap Spider and Scorpion Insecticide pint (16 oz)

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$56.50
Onslaught FastCap Spider and Scorpion Insecticide - Gallon gallon (128 oz)

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Buy 2 or more: $381.72 each

$397.71
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Onslaught FastCap Spider and Scorpion Insecticide

Onslaught FastCap Spider and Scorpion Insecticide is an economic and easy to use formula that provides quick knockdown and long lived residual control of scorpions, spiders, and other insects listed on the label. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list). This product is labeled for use as an indoor broadcast treatment.




Onslaught FastCap Spider & Scorpion Insecticide combines fast kill (action) and long residual activity against pests listed on this label when applied as surface or spot treatments, injected into wall voids, or as a crack and crevice spray in and around residential and commercial structures, as well as on turf and landscaping. Onslaught FastCap Spider & Scorpion Insecticide may be sprayed on any surface that will not be stained by water. DO NOT use this as a fogger or apply it as a space spray. Injector application equipment that delivers low volume treatments may be used to make crack and crevice injections or spot and general surface treatments.

Spiders, scorpions and other listed crawling insects Indoors:

Apply as a course, wet spray to surfaces where these pests are normally found. Treat floors, baseboards, around doors and windows, in attics, crawl spaces, eaves, corners, closets, walls, utility pipes, storage areas, and all cracks and crevices. Treat underneath sinks, dishwashers, refrigerators, stoves, the underside of shelves, drawers, cabinets, areas behind pipes, and in all places where these insects shelter. Contact as many insects as possible with direct spray. Repeat applications as needed, but do not exceed more than one (1) application every seven (7) days.

Mixing tip. Shake Onslaught FastCap bottle well prior to mixing. Clean spray equipment before using or diluting Onslaught FastCap. For dilution, add half the required water to spray tank, then add the appropriate amount of Onslaught FastCap. Agitate the mixture, and then slowly add the remainder of the water. Agitate the spray thoroughly before using and also occasionally during use to ensure dispersion. If you use a spray filter screen, they should be 50 mesh or larger.

Use Onslaught FastCap as part of an IPM program. Tank mix Onslaught FastCap with an IGR such as NyGuard IGR Concentrate to break the insect growth cycle and control future emerging insect populations. Do not apply Onslaught FastCap as a fog or space spray. Fog first with a product such as Riptide Water-Based Pyrethrin ULV to get the quick knockdown action of the fog followed by a surface application of Onslaught FastCap for residual control.

Rating Snapshot

5 stars   63
4 stars   11
3 stars   3
2 stars   2
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Most Helpful Customer Reviews
  • 32 of 32 people found this review helpful:

    5 of 5 stars  Initial review on effectiveness vs scorpions
    By Scott in Chandler Az on 03/02/2014
    Verified Purchase

    Main Target Pest- Bark Scorpion I have used Cykick, Cyper WP, Bifen IT, Demand, and suspend polyzone for scorpion control here in AZ. Cyckick seems to be the best so far. I don't have a huge problem with them, but I have found the occasional one indoors. I black light ~ every night once the temp is warm enough at night to monitor activity. I spray onslaught for the first time in mid feb. I went out 1 week later and found a dead one against the cinder block wall. I don't normally see this even with Cykick, so I got lucky or this stuff works well. It is also cheaper than Cykick per finished gallon once the price drop to _ 60/ bottle. I will use until gone and see how well it control scorpions this summer.

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  • 23 of 24 people found this review helpful:

    5 of 5 stars  FAST CAP ROCKS!
    By Wanda in Orlando, FL on 05/23/2013

    I live in an area where pests are common, this product controls them all. Bed bugs, fleas, ants, roaches, wasps, spiders scorpions... I had zero problems since I started using it. This product also lasts a long time, its around much longer than other products I have tried in the past.

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  • 22 of 22 people found this review helpful:

    5 of 5 stars  Works Great!!!! If you have scorpions get it!
    By Dana in Cumming, GA on 09/23/2013
    Verified Purchase

    I would really recommend this product. I got it for spiders & scorpions both inside & outside the house. I've only used inside so far but it works. I don't know if this stuff calls out the scorpions but 3 are dead so far. I didn't even know i had that many scorpions around. I live in a new development in a heavily wooded area so I expected critters, never scorpions though.

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  • 21 of 21 people found this review helpful:

    5 of 5 stars  EXCELLENT PRODUCT
    By Mike in Reliance, TN on 11/07/2014
    Verified Purchase

    We live in a National Forest surrounded by heavy forest. After years of paying $95+ per regular scheduled visits by a pest control company, we still had scorpions inside of our home. We knew something had to be done better than a local pest control service. After web searching, we came across this company and the product Onslaught. One application of Onslaught (2tbs) per gallon wiped out the scorpions & all other creeping critters! Best pest control product we have purchased. We cancelled our pest control service! We applied Onslaught on fire ants just to see what the results would be...killed them all dead within a few minutes! We highly recommend this product.

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  • 19 of 21 people found this review helpful:

    5 of 5 stars  Great poduct and service!!!
    By Darren in California on 11/16/2012
    Verified Purchase

    Your web site is user friendly and easy to navigate. The cost of your products are at or lower than others sites. I did find a sprayer on another site that was lower and I sent you the link. You then lowered the price and I purchased it along with insecticide. By the way, Onslaught Fastcap Spider Insecticide does what it says it will do!! Great product! Great company! I could'nt ask for a better outcome.

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Most Recent Customer Reviews
  • 5 of 5 stars  FasCap
    By Ec in Boerne on 11/24/2017

    The arachnicide was delivered promptly. I am ready for them as soon as the weather warms up. The sprayer application makes it easy and this should kill the scorpions and not hurt the beneficial insects like mantis and walking sticks.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Worked on scorpions for us.
    By Levi in Gilbert, AZ on 11/12/2017

    We live in Gilbert AZ. We deal with the bark scorpion. Since we have a 2 year old that loves to play in the backyard, I would go out every night with a black light and hunt for scorpions. I would find on average one scorpion every night. I would always kill them when I found them. That was getting old so I gave this Onslaught Fastcap Scorpion Insecticide a try. I wanted to make sure to really knock these guys out. Once mixed, I first sprayed in all the cracks of the block walls (that is where they like to nest). Then I sprayed a full coat up and down the block walls making sure I got 100 percent coverage. Then I sprayed and covered all the ground by walls (came in about 4 feet). Then I sprayed around the base of the house. Yes, it was a big job but I wanted to really give it my best. Then, time to test. I went out every night over the next 30 days with a black light. The first week I found 3 dead scorpions which means this stuff actually works. After that, I didn't see a single scorpion alive or dead for the 30 days following the application. I was stoked. After 30 days however, I found two live scorpions so this stuff when applied liberally, will do the job on the bark scorpion but you will have to re-apply every 30 days. A small price to pay to have a scorpion free yard if you ask me. Note, it did not rain once during the 30 days after application so I don't know if it would have needed to be applied again if it rained. Also, be sure to use a mask and rubber gloves when mixing and spraying.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Scorpion killer!!
    By Pedro in HENDERSON on 11/10/2017

    Great product, very effective. Every month spray and no signs of scorpions or spiders.

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  • 5 of 5 stars  Amazing
    By Alireza in Phoenix, AZ on 11/08/2017

    Yes, this thing works and it works amazing. And it costs much less than paying pest control companies, who by the way may dilute their products more than the manufacturer's recommendations.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Best scorpion killer
    By Bryan in Chandler Arizona on 11/08/2017

    I live in an apartment in Arizona and the management swore upon move in there are no pest. 2 months later I saw the most frightening creature crawl on the sofa. This prehistoric creature is called the Arizona bark scorpion so I was told to try Cykick it did absolutely nothing. I had to get rid of these things or move back to CA. They are the most creepy creatures. As it got warmer outside we were getting 7 to 10 a week. Massive infestation, they lit up like Christmas lights in the walkways. I got Onslaught and mixed 2 oz per gallon in a sprayer and went thru 8 gallons. So they are all around me but not on my patio or in my apt at all. I love this stuff. I can't rave enough about this wonderful product I now recommend this stuff to neighbors to control this problem. Its pricey but works!

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  • 3 of 5 stars  Spider treatment
    By Jim in Cunningham Tennessee on 10/22/2017

    Seams to be working will rate it again after a few months

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  • 5 of 5 stars  Ladybug and stink bugs
    By Michelle in Aliquippa, Pennsylvania was on 10/19/2017

    Wow! I was spraying the house and the ladybugs were dying/flying off. Love the product

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  • 5 of 5 stars  Great Product
    By Judy in Rexburg, Idaho on 10/10/2017

    We have found this to be very effective on our spiders, and cheaper than the stuff you can buy in the store!

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Scorpion killer!!
    By Roland in South Texas on 09/29/2017

    Due to hurricane harvey rainfall, my home was crawling with crickets which drew in the scorpions. Had local pest control company come in and retreat entire perimeter and still had scorpions crawling on foundation and porches. They told me to give it time to work and i told them that stuff they put out isn't even slowing down the crickets much less the scorpions. Sprayed Onslaught on porches and foundation and results were almost instant. Overnight there were numerous dead and dying scorpions and hundreds of dead crickets. These were the largest scorpions I've seen here, very healthy!! They were no match for Onslaught. Pest control company said to give it time to work but with scorpions, i want immediate results. The same night they sprayed their stuff, i saw scorpions running around on my porches. After spraying onslaught, the only scorpions I've seen are the good kind. Dead scorpions!!!!

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  • 1 of 1 people found this review helpful:

    4 of 5 stars  Great
    By Sinai in Albuquerque NM on 09/22/2017

    Absolutely love It!!!!! I do wish it could've been bigger for the price or a larger size before the $300 bottle. Gonna order again to have, just in case

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Most Helpful Q&A's

02/22/2015 Kagan from Las Vegas

QMixing Instructions
How much water do you mix to this product? Trying to decide if a bottle is enough to spray inside and outside of my house

AYou want to mix 1fl oz Onslaught FastCap Spider and Scorpion Insecticide into one gallon of water. One pint will give you approx. 16000 sq feet. 

26 of 27 people found this answer helpful.
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10/09/2013 Amy from Alexandria, Va

QIs Onslaught FastCap safe to use in homes with dogs?

AOnslaught FastCap is safe for pets when they enter the areas after the product has dried.

24 of 25 people found this answer helpful.
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05/19/2013 L. from Las Vegas, Nevada

QOnslaught versus Demand, Cykick or Cyzmic for Scorpions
To eliminate scorpions, is Onslaught the strongest, most effective insecticide to spray indoors and out? My treatments have included Demand, Cysmic and Cykick CS and Aerosol (aerosol for knockdown and cracks and crevices) and now am hearing about Onslaught FastCap Spider and Scorpion insecticide and wonder if it is stronger or the strongest. My thought is, if I'm spending money on insecticide and investing time to treat my home to ward off these horrible scorpions that I fear, I want the most effective product on the market. I'd rather purchase and concentrate on the best! Thanks.

AThe Onslaught FastCap would definitely be the best option for your needs. It is specifically formulated to better target spiders and scorpions with a more thorough and long lasting coverage for these hard to kill pests. Keep in mind, no matter what product you are using for scorpions, you have to create a wider barrier for them than any other pest around your home. For general insects you would treat with a barrier around the foundation 2 feet up and 2 feet out. With scorpions you should be doing 2-3 feet up and 6-10 feet out on the ground. Also make sure to treat any landscape areas around your home that they would be prone to hiding in ie: mulch, bark, landscape timbers, rocks etc. You can review more information for protecting your home from scorpions in our article on Scorpion Control.

19 of 20 people found this answer helpful.
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06/21/2013 Gary from South Point, Oh

QWhat's the best indoor spray for spiders?
Our church fellowship hall has an increasing amount of spiders and spider eggs. We are in a rural area of Ohio. They don't bother me that much...but a few female members are scared. What do you recommend? Please note we EAT in the fellowship hall.

AThe absolute best indoor/outdoor spider spray is Onslaught Fastcap. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list).

12 of 13 people found this answer helpful.
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08/14/2013 Kevin from Milford

QIs there a benefit to Onslaught FastCap vs. regular Onslaught?
I've been using regular Onslaught for residual hornet, ant, and earwig control. Is there a benefit to switching from regular Onslaught to FastCap? Either way, I need to buy another bottle, and want to make sure I'm getting the best.

AThe biggest difference of Onslaught Fastap and Onslaught are the Onslaught Fastcap  combines a one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. So Onslaught Fastcap offers an even quicker more intense knockdown.

6 of 8 people found this answer helpful.
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Most Recent Customer Questions

12/05/2017 Warren from New Braunfels, Tx

QIs Onslaught FastCap safe to use in backyards with puppies?
My puppies bury their face in the grass, to catch and eat spiders. They also eat some grass.

A

Yes, it is safe for kids and animals to enter the treated area after†Onslaught FastCap Spider and Scorpion Insecticide†has been applied after the product has had time to dry.†

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10/17/2017 Lee from Yuma, Az

QDoes Onslaught FastCap Spider and Scorpion Insecticide have any adverse affects on lizards?

A

Yes,†Onslaught FastCap Spider and Scorpion Insecticide†will inadvertently affect lizards as they feed on insects that have come into contact with the treated area. Since their food source will be reduced the lizards will also not find an abundance of prey on your property.

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09/22/2017 Devin from Escondido, California

QWhat's a good insecticide for Spiders & Scorpions?
As a non-pro, I'm a a bit overwhelmed by your selection of insecticides. I need something to rid my home (mostly outside) of spiders & scorpions (& maybe ants if theres something that will get those as well, but this is secondary). I have a pump sprayer and a Fogmaster Jr. that I can use for application. I was hoping you could offer a recommendation on what would be the best product to use in this situation. THANKS!

A

We would recommend that you apply†Onslaught FastCap Spider and Scorpion Insecticide†for spiders and scorpions. It is mixed at 1 oz per gallon of water and the pint size bottle will treat 16,000 sq ft providing you with†a 30 day residual. You will also find that it treats over 200+ other insects, including ants.

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09/21/2017 Jim from Phoenix, Az

QCan I mix CyKick CS and Onslaught FastCap Spider and Scorpion Insecticide for maximum effectiveness on scorpions?

A

Onslaught FastCap Spider and Scorpion Insecticide†and Cy-Kick CS†should not be mixed together. Using either of these products will do a great job controlling scorpions.†Making a pesticide too strong can actually backfire. Areas that are treated with this overly concentrated spray will be repellent and insects will simply avoid the treated areas prolonging the infestation

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09/10/2017 Sherry from Bloomington,mn

QIs Onslaught FastCap Spider and Scorpion Insecticide the best product to use for spider control?
Too many spider webs on exterior of house and garage. I take them down-next day their back.

A

Onslaught FastCap Spider and Scorpion Insecticide†would definitely be the best option for your needs. It is specifically formulated to better target spiders and scorpions with a more thorough and long lasting coverage for these hard to kill pests. Keep in mind, no matter what product you are using for scorpions, you have to create a wider barrier for them than any other pest around your home. For general insects you would treat with a barrier around the foundation 2 feet up and 2 feet out. With scorpions you should be doing 2-3 feet up and 6-10 feet out on the ground. You can also spray inside around cracks and crevices, baseboard areas, and potential entry points such as around window and door frames and where plumbing meets the wall. †Also make sure to treat any landscape areas around your home that they would be prone to hiding in, i.e.,†mulch, bark, landscape timbers, rocks etc. You can review more information for protecting your home from spiders in our article on†Spider Control.†

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08/27/2017 Clark from Lone Pine, Ca

QWhat is the most effective black widow killer and prevention?
Need to treat garages, and feed boxes on ranch outside.

A

There are a lot of products that can be used for black widows and other spider species in a lot of areas. Onslaught FastCap would be a great option for use around the home, garages and areas they would typically harbor in around the home. You would not be able to spray it directly in feed boxes but you can spray under and around them. You can use 0.5 - 1 oz per gallon and treat on a monthly to quarterly basis to keep them under control.†

You can see tips on controlling spiders and where to treat in general by looking at our Spider Control Guide.

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08/04/2017 Joe from Fort Calhoun, Ne

QDoes Onslaught Fastcap's residual kill spiders (including Brown Recluse and Black Widow), or is it repellent?

A

Onslaught FastCap Spider and Scorpion Insecticide†is specially designed to kill spiders and will do a great job. †It is not a true repellent in that it will keep insects away, but will instead provide a long residual to continue to kill those that contact a treated surface.

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07/27/2017 Adam from California

QHow many ounces Onslaught FastCap Spider and Scorpion Insecticide do I mix in a 25 gallon rig tank?

A

You will need 12 oz of Onslaught FastCap Spider and Scorpion Insecticide per 25 gallons water.

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07/27/2017 Pancho from Yima, Az

QCan I apply Onslaught FastCap Spider and Scorpion Insecticide to my trees/desert plants that are affected with spider mites?

A

Yes, Onslaught FastCap Spider and Scorpion Insecticide can be used to treat spider mites.†

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07/18/2017 Karli from Rogers, Ar

QWhen mixing Onslaught FastCap with water, should I adjust the ph of our water to below 6.9 for effectiveness?
Can I add vinegar to lower the water ph?

A

There is no water pH requirement when using†Onslaught FastCap Spider and Scorpion Insecticide.† It cannot be mixed with vinegar.††

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