Insect Sprays FAQs

DIY Professional Outdoor & Indoor Surface Spray

Why are ants still walking on the area I’ve treated with Mortein Do-It-Yourself Professional Outdoor & Indoor Surface Spray?

Mortein Do-It-Yourself Professional Outdoor & Indoor Surface Spray is an insecticide, not a repellent  — it’s not designed to keep insects off the area you’ve sprayed. Instead, it leaves behind an insecticide residue that the insect absorbs as it comes into contact with the treated area. This residue lasts for up to 3 months outdoors. The product is intended to kill the insect before it breeds, preventing infestation. The extent and severity of the existing problem will determine the length of time before you notice a decrease in insects. Ants are the most difficult to kill with residual spray products. As ants walk across the treated area they pick up a small dose of insecticide, which may not kill them immediately.

What must I do when the product comes in contact with clothes?

Wash the clothes immediately.


NaturGard Auto Protect Indoor Insect Control System

Will Mortein NaturGard Auto Protect Indoor Insect Control System affect birds kept inside the house?

No, provided you direct the spray away from your feathered friends to avoid a build-up of spray in and around their cage, which over time could lead to risk of overexposure.

Is it okay to use Mortein NaturGard Auto Protect Indoor in the kitchen?

No. The spray should be positioned away from food and food preparation areas. After all, it’s meant for bugs, not people, so keep it out of the kitchen.

Is it okay to use Mortein NaturGard Auto Protect Indoor in the baby’s nursery?

No. It’s important to use this product in well-ventilated rooms away from children’s activity and play areas, so it’s not recommended for use in the baby’s nursery.

Is it okay to use Mortein NaturGard Auto Protect Indoor on carpeted areas?

Yes, but be aware light-coloured carpet may become discoloured. The same may happen to carpet in a high-traffic area.

If the spray gets onto furniture, how can it be removed?

Simply clean with warm soapy water and dry thoroughly.

Can Air Wick Freshmatic be run alongside Mortein NaturGard Auto Protect Indoor?

Running these two side by side isn’t ideal as the Freshmatic may change the spray distribution pattern of the NaturGard and compromise its effectiveness.

If another spray is used manually while Mortein NaturGard Auto Protect Indoor is running, will the area be overdosed?

You don’t have to worry. Over a 24-hour period the system disperses the equivalent of a single 3- to 4-second spray at regular intervals.

After installation how long does it take for Mortein NaturGard Auto Protect Indoor to reach full effectiveness?

After installing the device you can expect to be fully protected in about 24 hours.

How effective is Mortein NaturGard Auto Protect Indoor in places such as New Zealand, where there are few flyscreens?

With or without flyscreens, you can be sure this product will help keep flies and mosquitoes out of your home.

Is it okay to install Mortein NaturGard Auto Protect Indoor where there are children, especially those who are crawling?

The product must only be used in well-ventilated rooms and away from children’s activity and play areas.

Should the product be turned off when we go on holiday?

Not necessarily, but it’s recommended that you turn it off if you’ll be away for more than a week. Plus, you’ll save money!

Is it okay to install Mortein NaturGard Auto Protect Indoor where the walls are papered rather than painted?

You can install it on papered or painted walls, but it should never be located so that it’s pointing directly at a wall.

Should windows be left open a little when using this product?

Yes. The room must be well ventilated, so if the product is installed in a small area, it’s advisable to keep a door or window open.


Remember to read the label before installing and using this product and only use as directed


Naturgard Auto Protect Outdoor Insect Control System

Is it okay to use Mortein NaturGard Auto Protect Outdoor near barbecues and food areas?

No. Aerosols are highly flammable, so they must be kept no less than 5 metres away from a naked flame, heater or incandescent materials. That means Mortein NaturGard Auto Protect Outdoor should be kept clear of barbecues, outdoor heaters, open fireplaces and outdoor refrigerators. It should also be kept away from food areas.

Can this product be installed near food areas?

No. Food, water, food preparation areas and kitchen utensils must not be exposed to the Mortein NaturGard Auto Protect Outdoor unit. If you’re mounting it on a wall, don’t allow children and pets to play or eat directly under the device.

Can the Mortein NaturGard Auto Protect Outdoor system be used indoors?

No. It’s designed for outdoor use only. Indoors, use the Mortein NaturGard Auto Protect Outdoor system, ensuring the area is well ventilated.

Is it okay to use Mortein NaturGard Auto Protect Outdoor around pets?

No. Keep the Mortein NaturGard Auto Protect Outdoor unit away from pet areas, including fish tanks, fish ponds and beehives, as it can be very toxic to aquatic life and bees.

Can I leave Mortein NaturGard Auto Protect Outdoor outside during summer?

Yes. However, you need to keep the unit out of direct sunlight. Don’t expose the canister to temperatures exceeding 50°C, as it’s pressurised and flammable. Store the unit indoors when not in use.

Will the product control crawling insects too?

No. Mortein NaturGard Auto Protect Outdoor is designed to control only flies and mosquitoes.

How can I tell the difference between Mortein NaturGard Automatic Indoor and Mortein NaturGard Automatic Outdoor?

Mortein NaturGard Auto Protect Outdoor has two adjustable control settings (20 and 40 seconds) and the green LED light is in the centre above the spray outlet. Mortein NaturGard Auto Protect Indoor has three adjustable control settings and the green LED light is on the right-hand side.