Ortho Home Defense Indoor & Outdoor Insect & Roach Killer

Last updated date: June 26, 2020

DWYM Score

Ortho Home Defense Indoor & Outdoor Insect & Roach Killer

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We looked at the top Roach Sprays and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Roach Spray you should buy.

Overall Take

This sprayer is a great long term solution for defense against not just roaches but several types of insects. It is suitable for indoor or outdoor use and goes on without leaving behind a residue. It kills on contact but can also serve as a barrier around the home for up to a year. In our analysis of 73 expert reviews, the Ortho Ortho Home Defense Insect & Roach Killer placed 1st when we looked at the top 10 products in the category. For the full ranking, see below.

Editor's Note June 26, 2020:
Checkout The Best Roach Spray for a detailed review of all the top roach sprays.

Expert Summarized Score
10 expert reviews
User Summarized Score
12,127 user reviews
Our Favorite Video Reviews
What experts liked
Spray on non-porous surfaces to create a bug barrier that lasts up to 12 months. Kills ants, roaches, spiders, and other insects. Non-staining. Odor-free. Can help you determine where insects are entering your home.
- BestReviews
Large volume for food price, creates a long-lasting barrier, good for indoor and outdoor use
- Business Insider
Once it has treated your home, the Invisishield barrier technology will create a protective barrier to keep bugs out for up to 12 months.
- Wise Bread
It doesn't leave behind any residue, so the only reminder you'll have that you applied it will be the absence of vermin in your home.
- Wiki EZ Vid
Comes with a wand to reach small spaces
- Pest Strategies
It won't stain the surface you spray it on and, in addition to providing on-contact protection, it also creates a bug barrier that will last up to a year.
- Bustle
As well as being highly effective at killing roaches, even those stubborn German cockroaches, inside your home, Ortho can be sprayed around the perimeter of your property and can kill 130+ other insects including stink bugs, beetles, earwigs, fleas, house centipedes, millipedes, scorpions, silverfish, and ticks.
- Morning Chores
This mixture not only acts as an instant poison, but it also serves as a repellent.
- Stop Pest Info
The spray is effective as a kill-on-contact spray for several different types of insects.
- Pests
The Ortho spray comes with a spray wand, which is easy to use and reduces hand fatigue.
- Pest Control Hacks
What experts didn't like
Need to keep pets and small children away until product dries. Sprayer can malfunction.
- BestReviews
Electric spray nozzles sometimes fail after minimal use
- Business Insider
Roaches can sometimes survive sprays due to faulty design
- Pest Strategies
Not effective if applied in the wet weather
- Morning Chores
Does not eliminate the entire colony
- Stop Pest Info
Outdoor applications tend not to last as long as indoor and need to be re-treated more often.
- Pests
Has toxic chemicals that can cause allergic reaction.
- Pest Control Hacks

From The Manufacturer

Don't just kill bugs, create a bug barrier with Ortho Home Defense Insect Killer for Indoor & Perimeter2 with Comfort Wand. Kill ants, cockroaches, spiders, fleas and ticks while creating a bug barrier for up to 12 months of protection (for ants, roaches, and spider’s indoors on non-porous surfaces). The easy-to-use, continuous one-touch spray Comfort Wand eliminates hand fatigue, making it easier to apply to the perimeter of your home to create a pest barrier. Also, use as an indoor pest control. With its non-staining and odor-free formula, you can confidently use in areas like kitchens or bathrooms.

Overall Product Rankings

Ortho Home Defense Indoor & Outdoor Insect & Roach Killer
1. Ortho Home Defense Indoor & Outdoor Insect & Roach Killer
Overall Score: 9.2
Expert Reviews: 10
MDXconcepts Organic Home Pest Control & Roach Spray
2. MDXconcepts Organic Home Pest Control & Roach Spray
Overall Score: 9.1
Expert Reviews: 11
Raid Ant & Roach Killer Spray
3. Raid Ant & Roach Killer Spray
Overall Score: 8.9
Expert Reviews: 1
Mighty Mint Natural Peppermint Oil Roach Spray
4. Mighty Mint Natural Peppermint Oil Roach Spray
Overall Score: 8.8
Expert Reviews: 5
Black Flag Dry Ant & Roach Aerosol Spray
5. Black Flag Dry Ant & Roach Aerosol Spray
Overall Score: 8.7
Expert Reviews: 4
Hot Shot HG-96781 Roach Insecticide Spray
6. Hot Shot HG-96781 Roach Insecticide Spray
Overall Score: 8.7
Expert Reviews: 3
Wondercide Natural Indoor Roach Spray
7. Wondercide Natural Indoor Roach Spray
Overall Score: 8.6
Expert Reviews: 13
Bengal Roach Killer Spray, 2-Pack
8. Bengal Roach Killer Spray, 2-Pack
Overall Score: 8.6
Expert Reviews: 10
Rodent Sheriff Roach Pest Control Spray
9. Rodent Sheriff Roach Pest Control Spray
Overall Score: 8.5
Expert Reviews: 6
S C Johnson Wax Raid Ant & Roach Barrier Spray
10. S C Johnson Wax Raid Ant & Roach Barrier Spray
Overall Score: 7.9
Expert Reviews: 0

An Overview On Roach Sprays

Do you feel like your home is your castle? If so, nothing can send you rushing to the battlements like the sight of a roach.

Even the most staunch animal lovers draw the line at cockroaches, for good reason. Aside from mosquitoes, they’re one of the hardest insects to love — and the hardest to kill. They tend to come out only at night. They’re great at hiding in even the smallest crevices. They multiply quickly, in rates that put rabbits to shame. Worst of all, they need the same food, shelter and water that our homes provide, and once they find it you can bet they’re setting up camp.

Roach sprays are one of the most popular ways to deal with these persistent pests. They’re hardly the only method, and they do work best when combined with other, more long-term solutions. But when roaches make an appearance, they’re one of the fastest ways to make them disappear.

Sprays can be formulated from a variety of different ingredients, some of which can carry health risks for more than their intended target. But the two main types of aerosol roach killers are intended for residual and non-residual use.

Of the two, residual sprays are a more strategic form of pest control. They lay down a deposit on surfaces commonly visited by roaches. Some residual sprays are meant to be a repellent to these bugs and serve as a barrier to their entry. Such sprays might include relatively benign ingredients such as peppermint oil or chrysanthemum extract.

Other residual sprays offer a more aggressive solution, using toxic substances that will stick to the roaches’ bodies as they walk through. These substances will either kill the roaches by poisoning them (and any roaches they come in contact with at the hive) or act as an IGR (insect growth regulator) by sterilizing them. Some sprays can even do a little of both. Lethal residuals commonly use cypermethrin or some other member of a synthetic class of chemicals called pyrethroids. Some common IGRs include hydroprene or methoprene. Either way, you’ll want to avoid using these residuals on surfaces where you eat or where children might play. Doorways or baseboards are usually a good bet.

Some of the best residual roach killers can only be used in certain areas, so pay attention to the ingredients and user guides. Products containing diatomaceous earth are especially popular and effective at sticking to roach legs, but the substance has to stay dry to work. Needless to say, that limits its use outdoors.

Non-residual sprays are a more immediate solution. Pyrethroids are another go-to ingredient in these sprays, but they are formulated more differently and are meant to kill on contact. Again, try to avoid using these on kitchen countertops or near pets or small children.

Knocking out a single roach or two with these products might be satisfying, but once again: It’s hardly a permanent solution. Once you see one roach, you can be sure there are more. A better strategy might be a multi-pronged approach. Non-residual sprays with a thin nozzle attachment are great for flushing cockroaches out of corners or cracks, right onto areas where you may have laid down a residual layer of insecticide. You can use this same process with bait traps or other non-spray forms of pest control.

DWYM Fun Fact

Contrary to that old saw, there’s no sane evidence that confirms cockroaches could actually survive a nuclear explosion. They could certainly handle the radiation afterward for much longer than humans, however, not to mention a host of other traumas. Most roaches can survive with no food for up to a month, and can even make do for about a week without their head. (While they do need their mouth to eat, a roach’s open circulatory system allows it to breathe without one.)

The Roach Spray Buying Guide

The more weapons you have against roaches, the better. Just make sure to use them wisely. If you’re using bait traps, IGRs or some residual spray with a delayed effect, make sure you don’t use a contact killing spray anywhere too near that area. Roaches will avoid the traps you’ve set, rendering them ineffective.