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Natural repellents based on powerful ingredients : an effective defence against insects in our homes

The fight against crawling and flying insects invading our homes can be waged naturally thanks to a range of powerful plant-derived ingredients. In addition to insects, these natural active ingredients can also act as repellents for other animals, such as moles, slugs and even snakes. These repellents offer an environmentally and human health-friendly alternative to harsh chemicals. Let's find out how ingredients such as geraniol, eucalyptus citriodora, margosa, vegetable pyrethrum and essential oils can play a crucial role in defending our living spaces.

1. Geraniol : Geraniol, a natural compound found in certain essential oils such as citronella and geranium, has repellent properties against a variety of insects, including mosquitoes and flies. Geraniol-based products can be sprayed into rooms or applied to the skin to keep insects away.

2. Eucalyptus Citriodora : Eucalyptus citriodora essential oil is known for its strong lemony aroma. It is effective against mosquitoes and other biting insects. Mixed with a carrier oil, it can be applied to the skin or used in diffusers to keep insects at bay. Penn'Ty Bio offers a range of lemon eucalyptus products to protect you from insect bites

3. Margosa (Neem) : Margosa extracts, derived from neem seeds, have well-established insect repellent properties. The bitter odour and repellent action of margosa make it a valuable ingredient in sprays and lotions for protection against insects.

4. Plant pyrethrum : extracts of plant pyrethrum are obtained from the flowers of certain varieties of chrysanthemum. They are used to make natural contact insecticides or repellents. Pyrethrum is effective against a wide range of insects, including ants, flies and cockroaches.

5. Essential oils : As well as geraniol and eucalyptus citriodora, many other essential oils can be used as natural repellents. Peppermint, clove, lavender and lemon are just a few examples of oils with repellent properties. They can be mixed with water to create sprays or added to cleaning products.

Using natural repellents based on these ingredients offers a solution that is not only effective, but also without the drawbacks of traditional chemicals. However, it is important to note that although these options are natural, some people may be sensitive to essential oils or plant extracts. Before using these products, it is advisable to carry out a skin patch test and follow the manufacturer's instructions.

By adopting natural repellents, you can create a hostile environment for unwanted insects, while keeping your home and the surrounding ecosystem safe.

Alt'o Limaces - natural repulsive snails and snails - 1 kg - Penntybio

Alt'o slugs - natural repulsive slugs and snails - 1 kg

€8.25 Tax included
Delivery expected from 05/24/2024

ALT’O SLUGS is a mechanical anti-slug barrier based on pozzolan, a natural volcanic rock with very sharp edges that prevent snails and slugs from getting through. Long-lasting physical barrier. Resistant to rain. 1 kg can.

Last available (1 Item)


case-a-cocher.jpgEffective, long-lasting mechanical barrier against slugs and snails
case-a-cocher.jpgSolution based on natural volcanic rock
case-a-cocher.jpgEasy to apply
case-a-cocher.jpgCan be used in organic farming

Watch out for slugs!

Lutter contre la limace horticole

Your leaves are full of holes, your transplanted plants are shaved and your seedlings are devastated, don't look too long, slugs and snails have been there... Slugs can quickly become the nightmare of any self-respecting gardener. These slimy little creatures are no danger to humans, but they can wreak havoc in your garden! All you need is a damp, cool night between 15° and 18°C to see these pests of young shoots appearing everywhere. And in the spring, with the plants starting to grow, slugs and snails have a field day.

Alt'O Slugs, natural slug control solution

ALT'O SLUGS is a solution to combat damage caused by slugs and snails. It offers an effective and durable mechanical barrier made of pozzolan, a volcanic rock with very sharp edges. Once the pozzolan is spread around the plants you want to protect, snails and slugs will have a hard time reaching them. 

Like eggshell (but not as durable), the effectiveness of pozzolan is related to its sharpness. The slug will not move on volcanic rock because it will injure itself, its skin being extremely thin and fragile. It is without doubt one of the most natural, inexpensive and effective slug repellents available.

But its use is multiple, since these lava granules also serve to drain, lighten and remineralise the soil.

Of volcanic origin, lava granules contain all the minerals necessary for plants, particularly silica, but also magnesium, calcium, aluminium, iron, etc. They facilitate plant rooting and lighten the soil by improving drainage.

These pozzolan granules are non-toxic to pets, hedgehogs or any other garden animal.

Effective for several weeks and resistant to heavy rain, it naturally repels slugs and snails.

You can use ALT'O SLUGS for your vegetable garden, orchard, ornamental garden, as well as your potted plants. 

Advantages of ALT'O SLUGS

La pouzzolane contre les limaces et les escargots

+ Resistant to rain and humidity

+ As a mulch, prevents weeds from growing

+ Long-lasting mineral mulch: more than 5 years pH neutral, does not acidify the soil and lightens heavy soils

+ Abrasive, naturally repels slugs and snails

+ Mixed in the soil, in the compost or placed at the bottom of pots or planting holes, it allows better drainage and avoids asphyxiation and root rot due to excess water

+ Can be used in Organic Agriculture (In accordance with EC Regulation 834/2007)

Our advice for use

Against slugs and snails : Remove slugs already present, weeds, leaves and other dirt around the plants. Spread a strip of ALT'O SLUGS at least 5 cm wide and about 1 cm thick around the plant. 1 kg of granules will create a barrier of about 6 linear metres. Make sure that the circle is always well closed. If necessary, add a little more granules to close it. After harvesting, the granules can be incorporated into the soil as a soil improver.

Drainage : Place a layer of pozzolan at the bottom of the pot and mix the pozzolan with the soil or compost. 2 to 4 cm thick. Drainage incorporated into the soil: 10% by volume. Mulch: 2 to 4 cm thick (20 to 40 L/m²).

As a mulch : Spread the pozzolan at the foot of the plants.

Composition ALT'O SLUGS

Volcanic rock. Dry matter: 90%. Conductivity: 5 mS/m. Water retention capacity: 15%. pH (H2O): 7. Gauge: 0-5 mm. 

Period of use

Période d'utilisation Alt'o Limaces


Bottle with spout containing 1 kg of pozzolan. 

To complete the fight

Over the years, gardeners have tested a multitude of natural remedies to combat slugs (eggshells, wood ash, sawdust, water + garlic spray, coffee grounds, etc.). In most cases, this consists of keeping them at a distance or relying on the fact that slugs do not like to move on rough and drying surfaces. This is because they dehydrate the mucus film on which they move. But most of them do not offer a sufficiently durable solution. The technique must therefore be repeated regularly because the slug will not wait for you. As soon as there is an entrance to eat, they go for it ! Volcanic rock of the pozzolan type has the particularity of being inert and of having a very long life span and resistance to rain. This makes it one of the best repellent barriers against slugs.

Alternatively, another very effective method is to welcome the natural enemies of slugs. The most important of these are not hedgehogs, thrushes or toads, whose presence is random and seasonal, but insects: carabid beetles, scented staphylines, glow worms, millipedes... And of course, chickens! They will be delighted to please you!


Focus on pozzolan, a 100% natural eruptive rock

Made up of volcanic slag, i.e. basaltic volcanic projections, pozzolan has a scoriaceous and honeycombed texture. Its colour is generally reddish (from brick red to dark brown). 

Often used in landscaping, pozzolan limits irrigation and the development of weeds. This rock, which ranges in colour from red to black to grey, is also used in horticulture as a pure or mixed substrate. There are different granulometries of pozzolan depending on the use (water filter, sandblasting of icy roads, refractory concrete).

Pozzolan is a very porous material, favouring drainage. It can therefore be combined up to 75% with materials such as peat or coconut fibres.

Pozzolan has excellent physical and chemical stability, which makes it very durable. It does not degrade (does not settle, is not friable) and does not react with the nutrient solution. It is an inert substrate with a neutral to slightly acidic pH.


Regulatory information

P102 - Keep out of reach of children. P270 - Do not eat, drink or smoke when handling this product. P301+P312 - IF SWALLOWED: Call a POISON CENTER or doctor if you feel unwell. P261 - Avoid breathing dust/fumes/gas/mist/vapours/spray. P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easily removable. Continue rinsing. P501 - Dispose of contents/container at a hazardous or special waste collection point in accordance with local, state, national and/or international regulations.

1 kg

Specific references


Safety Data Sheet

FDS Alt'O Slug

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J'ai appliqué le produit tel qu'indiqué sur le flacon et j'ai constaté en eftet que les escargots ne se sont plus attaqué à mes plants de courgettes et haricots verts.
de plus le produit étant bio, tout est parfait

Mireille Oubrier

Parfait !

Parfait ! Et expédition rapide. Merci beaucoup.

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Alt'o slugs - natural repulsive slugs and snails - 1 kg

ALT’O SLUGS is a mechanical anti-slug barrier based on pozzolan, a natural volcanic rock with very sharp edges that prevent snails and slugs from getting through. Long-lasting physical barrier. Resistant to rain. 1 kg can.

Write your review