Kill Insects on Contact and After Treatment with Liquid Residual Insecticide
Are Liquid Residual Insecticides Safe?
For more than a century, liquid residual insecticides have been the primary choice in agriculture for safeguarding crops against insects, weeds, fungi, and other pests. These insecticides maintain their effectiveness over extended periods, ensuring ongoing pest control. In a recent Kurzgesagt episode comparing organic food to conventionally grown food (which involves pesticide use), numerous scientific studies found that the risks posed by pesticides to adults are akin to consuming a glass of wine every three months!
If residual insecticides are safe for protecting food products, they do not need to be a cause for concern when applied to surfaces around your home or office.
Why Use Protector C Insecticidal Surface & Space Spray?
Protector C is a more environmentally friendly, water-based, ready-to-use liquid residual insecticide for professional and amateur use. It is one of the best insect-killer products registered in Ireland.
- Approved to use on mattresses, carpets & soft furnishings
- No smell during and after use and non-flammable
- Nanoemulsion formulation for strong effective kill.
- Contains 0.09% cypermethrin for a long-lasting residual kill effect for up to 3 months.
- Kills and deters many types of flying and crawling insects such as ants, cockroaches, beetles, bed bugs, fleas, flies, moths, silverfish, booklice and wasps.
- Fast application with ready-to-use formulation, at a rate of 20ml per square metre.
- You can use the sprayed area immediately after spraying with Protector C
- Pump spray so no ozone-depleting aerosol propellant is required.
Details & Formulations
Protector c is an advanced nanoemulsion formulation based on water and containing the active ingredient cypermethrin at 0.1%. This liquid residual insecticide is available in 1 Litre trigger spray bottles or 5 Litre flagons (for use in compression sprayers).
The advanced nanoemulsion technology creates ultra-fine droplets which penetrate all the cracks & crevices where small bug pests are harbouring. This results in an immediate kill and knockdown effect with the added benefit of the active ingredient remaining on the surface, for up to three months, to kill any insects that enter from a non-treated area.
Instructions for use
- Always read and follow all advice from the product label. Use pesticides safely.
- Space treatments: Apply 1ml of product per cubic metre as a fine mist
- Surface sprays: Apply 20ml of product per square metre, slightly wetting the surface to be protected.
- Repeat treatment when and as required.
The video below illustrates how to apply liquid residual insecticides (and Insect Powder Dust):
Product Datasheets
Frequently Asked Questions
Can I use Protector C on beds for bed bugs?
Yes, you can. Remove all bedding and wash on a hot wash and tumble dry on a hot setting. Spray Protector C on the mattress (both sides) and the whole room, particularly the bed frame. The mattress is safe to use when dry.
How do I use Protector C to protect clothing and bedding from moths?
Clean the storage cupboard and spray with Protector C as a surface treatment. Replace clean clothes in the cupboard.
Can I use Protector C on my soft furnishing?
Yes, you can. Protector C is specifically approved for use on soft furnishings in the home, so you can treat your carpets and lounge suites as well.
I have pets, can I spray Protector C in rooms for fleas, mites and other bugs?
Yes, you can, but not directly on pet the bedding (all fabrics should be washed). Make sure your pet is not around until the insecticide is completely dry (2 – 3 hours). Also, remember to treat furniture as well. Treat your pet with an approved veterinary-use insecticide.
Can I use Protector C Liquid Residual Insecticide around my farm?
Yes. It is recommended by the Institute of Animal Health for use on housing, vehicles and farmyards. It is also an approved insecticide by the Department of Agriculture, Food and the Marine (DAFM).
I am not very confident about using liquid insecticides. Can I get help?
There are many videos online that will give you advice on how to apply insecticide. You can check a short help video HERE
Further Advice
- Wash hands and exposed skin before meals and after use.
- Prevent access to bait by children and animals.
- Keep in a safe place.
- This liquid residual insecticide is not to be used on pet bedding, pet sleeping quarters or where pets frequently lie.
- Hazardous to bees.
- Do not use where food, feed or water could become contaminated.
- Do not contaminate surface water or drains with liquid residual insecticides or used containers.
- Do not re-use the container. Store in original container.
- Shelf life up to 2 years.
- To avoid risks to human health and the environment, comply with the instructions for use.
First Aid
- Skin contact: No harmful effects are anticipated from dermal exposure. Wash with soap and water.
- Eye contact: Possible irritation. Rinse with water thoroughly. If irritation persists seek medical advice.
- Ingestion: Low toxicity. Wash out your mouth with soap and water and seek medical advice.



Prompt delivery. I have been using this product for some time to counteract silverfish. I use monthly and it works!
Thank you, Angela, for your lovely review and for being a returning customer.
We are delighted to hear that our liquid residual insecticide has been helping you keep silverfish under control and that your monthly treatment routine is working so well. Silverfish can be persistent pests, so regular applications of a long-lasting residual insecticide are an excellent way to prevent populations from becoming established.
It is also great to hear that your order arrived promptly. We always aim to provide fast delivery alongside effective pest control products and expert advice.
Thank you again for your continued support and for choosing Owl Pest Control. We really appreciate your recommendation.
Excellent product, worked instantly. Need to keep topping up but so far I’m delighted with the results.
Thank you, Alan, for your great review.
We are delighted to hear that the liquid residual insecticide worked so quickly and that you are pleased with the results. This long-lasting insecticide is designed to provide fast knockdown followed by a residual effect, helping to control crawling and flying insects for weeks after application.
Depending on the type of insect and the level of infestation, repeat applications may occasionally be needed, particularly where new insects are being introduced from outside or where there is heavy activity. Maintaining treatment of key areas such as skirting boards, cracks, crevices and entry points will help provide ongoing protection.
Thank you again for choosing Owl Pest Control, and we are pleased to hear the product is working so well for you.
All ok
Thank you, Pawel, for your review.
We are pleased to hear that everything was satisfactory and that you were happy with the liquid residual insecticide. This long-lasting insecticide is designed to provide effective control of a wide range of crawling and flying insects, making it a reliable choice for both preventive and active pest control.
We appreciate your support and thank you for choosing Owl Pest Control. If you ever need any advice on using the product or selecting the right insect control solution, our team is always happy to help.
Silverfishes drastically decreased!! Since I used I saw only 3 for the last 2 weeks!!
Thank you for your feedback Svetlana, we really appreciate you sharing your results.
It is great to hear that the liquid residual insecticide has made such a noticeable difference in reducing your silverfish activity. Silverfish can be persistent, so seeing such a drastic drop in just a couple of weeks shows how effective a properly applied residual insecticide can be.
This liquid residual insecticide is designed to provide long-lasting control of crawling insects like silverfish by treating the areas where they hide and travel, such as skirting boards, cracks, and crevices.
For continued results, we recommend maintaining treatment in key areas and combining it with good housekeeping to reduce humidity and hiding spots.
Thanks again for choosing Owl Pest Control, and we are delighted the product is working so well for you.
I got it to put down a Silverfish infestation and it did the the job. Many suggestions out there and online as to deal with these pests, but this is the only effective remedy I have found.
Thank you for your feedback Brian, we really appreciate you sharing your experience.
We are delighted to hear that our liquid residual insecticide successfully dealt with your silverfish infestation. Silverfish can be particularly persistent and difficult to control, so it is great to know that you found this to be an effective solution where other methods had not worked.
This liquid residual insecticide is designed to provide long-lasting protection by treating surfaces where crawling insects like silverfish travel and harbour, making it a reliable and professional-grade option for ongoing insect control.
Thank you again for your review and for choosing Owl Pest Control. If you ever need advice on preventing silverfish or tackling other insect issues, our team is always here to help.