How to read a pest product label

The label is the most useful thing in the box, and the one nobody reads. What each section means, from the active ingredient to first aid, and why it always wins.

Know-how 7 min read 9 October 2026

Every pest product comes with the same thing that nobody reads: the label. It is small, it is dense, and it is the most useful thing in the box. It tells you what the product is, what it is for, where it may go, how much to use, who must stay away and what to do if something goes wrong. Read it in the shop, read it again before you open the pack, and keep it until the pack is gone.

Labels look different from country to country, but the same sections are nearly always there. Take them one at a time.

Why the label wins

The label is written for that exact product, in that exact formula, as approved where it is sold. A forum post, a video, a shop assistant and this blog are all general. The label is specific. When they disagree, the label is right.

In many countries it is also more than advice: using a product in a way its label does not allow can be against the law. And if anyone ever needs a doctor, a vet or a poison centre, the label is the first thing they will ask for. That is why every plan on this site ends with “follow the label”, and why our safety page puts it first.

The active ingredient

Somewhere on the pack is a line naming the active ingredient, the chemical that does the work, usually with its amount or concentration. The brand name sits in big letters. This line is in small ones. It matters more.

Different brands can share one active ingredient. If a cockroach bait has stopped working, switching brand may change nothing. Switching to a different active ingredient might. See why gel bait stops working.
Some products kill, some stop growth. An insect growth regulator does not kill adults. It stops the young becoming breeding adults, which is why it is used alongside bait, not instead of it. More in what a growth regulator does.
Write it down. Note every active ingredient you have used, and when. A pest controller will want to know, and so will a doctor or vet if anyone feels unwell.

“Natural” on the front does not mean “use it however you like” on the back. Products sold as natural or mineral still have a label with directions and warnings. Diatomaceous earth is a good example.

Target pests: what it is actually for

The label lists the pests the product is approved against. If your pest is not on the list, do not assume it works anyway. An ant bait is made to appeal to ants. A product for crawling insects may say nothing about bed bugs. Getting the pest right first saves money, which is why we always start with what it actually is.

Where it may be used, and where it may not

This is the section people skip, and the one that causes most problems. Look for:

Indoors or outdoors. An outdoor product brought inside is not a stronger fix. It is a misuse.
Surfaces and spots. Many labels limit use to cracks and gaps, and rule out food preparation surfaces, bedding, mattresses, toys or anywhere children play.
People and animals. A product for the home is not for skin or fur. Pet treatments are a different category with their own labels.
Water. Some products must be kept away from drains, ponds and fish tanks because they harm water life.
Who may use it. Some products are for trained professionals only. If the label says so, it is not for home use, wherever you bought it.

How much, and how often

The label sets the dose: how big a dot of gel, how many bait stations per room, how far apart, how often to top up and how many times you may apply it. More is not better. With gel bait, small dots in many hiding places usually do more than a few big blobs, and the label tells you the size.

Check whether the label says anything about mixing. Do not combine products unless it allows it. Spraying near bait is a common way to undo your own work, as this answer on sprays explains.

Staying out and airing the room

Sprays, aerosols and foggers usually tell you how long people and pets must stay out, whether to wait until surfaces are dry, and when and how to air the room. There is no general rule. The time comes from the label of the product used, which is the whole point of how long to stay out after spraying.

Aerosols and foggers also tend to warn about flames and sparks, pilot lights included. Take that seriously: it is there because the contents can catch fire. It is one more reason foggers are rarely worth it.

Kids, pets and anyone vulnerable

“Keep out of reach of children” means a place a child cannot get to: high up, locked, or not in the home at all. A low cupboard is not out of reach. For bait, the label may say whether it comes in a child-resistant station and where stations may go.

Pet warnings deserve a slow read. A label may single out cats, fish, birds or bees, and something fine near one animal can be dangerous to another. Never use a product made for one species on another unless its label says you can.

Pregnancy and asthma are not always mentioned. If the label does not answer your question, ask a pharmacist or doctor before you use the product. Our answers on treatment with a baby at home, ant bait with babies and pets, pest control and pets and bug spray in pregnancy go further.

Kids and pets: if you cannot place a product out of reach of children and pets, leave that product out. There is nearly always another option, even if it takes longer.

Hazard words and symbols

Most labels carry a warning word, hazard symbols, and a list of precautions such as wearing gloves, washing hands after use or not breathing in the spray. The exact system differs by country. The meaning does not: these are instructions, not decoration.

Storage and disposal

Keep it in its own container, lid closed, label attached. Never pour it into a drinks bottle or food tub.
Store it high or locked, away from food and pet food, at the temperature the label gives.
Dispose of it the way the label says. That usually rules out the sink, drain or toilet. Leftovers may need your council’s household hazardous waste collection, so check with them if the label points that way.

First aid: read it before you need it

Every label has a first aid section: what to do for skin, eyes, swallowing or breathing it in. Read it before you start, not while someone is coughing. It takes a minute and you will know where to look.

If someone swallows a product or feels unwell after using one: follow the first aid section, then call the emergency number or poison centre where you live, or a doctor or pharmacist. Have the pack in your hand when you call. For a pet, call the vet with the pack.

Registration, and why the same brand differs abroad

Most labels carry a registration or authorisation number. It shows the product was approved by that country’s regulator for the uses printed on it. Approval is country by country. A product sold in one place may not be allowed in another, and a familiar brand can contain a different formula abroad.

That matters if you have moved, if you buy online from another country, or if a relative brings something back from holiday. If the product is not approved where you live, or the label is in a language you cannot read, do not use it. You cannot follow directions you cannot read.

We hold ourselves to the same rule. The plan you get from a Shoo scan names the type of product, tells you to read its label first, and never suggests anything a label does not allow.