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Funny smell in the house?

of our time we spend indoors
> 0 %

It usually starts with a bad feeling or an indefinable smell. Household chemicals are widespread and pollute the air we breathe every day. Although invisible, good air keeps us healthy and is our most important food.* 

Pollupatches help you to test for formaldehyde yourself and to quickly and easily identify harmful vapors in your home.

*A human can survive about 30 days without eating, but only between 3 and 7 minutes without air

Teppich? Kleidersschrank? Kommode? Welche Schadstoffquellen belasten die Raumluft?

Piece of furniture or source of pollution?

Fresh air keeps us healthy, fit and productive.
Residential chemicals, especially formaldehyde, are widespread and pollute the air we breathe every day.  

>90% We spend most of our time indoors, and our indoor air is usually 10 times more polluted than outdoor air.

Formaldehyde is a pungent-smelling gas classified as a "suspected carcinogen". It is used in numerous products as: 

– preservativel
– Adhesive component in wood-based materials,
– process chemical for 


With Pollupatch you choose a simple, proven and easy-to-use test patch that gives you reliable results and peace of mind.

With pollu patches, you can quickly identify pollutant vapors such as formaldehyde.


Pollupatches are designed to be placed with ease on any object, surface and even children's toys so you can monitor the chemicals being released. They change color in just 24-48 hours, warning you of unnecessary sources of pollution in your home. Using a simple traffic light color code that needs no introduction, the patches are easy to use.

How it works.

Die Patches sind schnell verteilt und der Test kann beginnen.

1. Distribute patches

Distribute the pollu patches in the room at the places where you suspect sources of pollution.

Nach 24-48h können die Ergebnisse einfach abgelesen werden.

2. Waiting

Within 24 to 48 hours, the green patches turn yellow or reddish if contaminants are present. If there are few-none, they remain green.

Eine Auswertekarte ermöglicht es sofort passende Maßnahmen zu ergreifen.

3. Evaluate

You can evaluate the test yourself using the simple color traffic light. The enclosed catalog of measures will then help you to act in a targeted manner.

Do you want to try it?

Trial Set

Try the test and test up to 3 samples
  • 5x patches
  • 1x evaluation card
  • 1x catalog of measures

room kit

Test up to 8 surfaces or objects. Get certainty about what sources of pollution are or are not in your area.
  • 10x patches
  • 2x evaluation card
  • 1x catalog of measures

housing kit

Teste mehrere Zimmer und bis zu 23 verschiedene Stellen. Spare pro Messstselle.
  • 25x patches
  • 5x evaluation cards
  • 1x catalog of measures
Samuel Kärer
Samuel Karer
Read More
I've had problems in my room for a long time. It started with the fact that I often had the feeling that something was wrong in the room. It's difficult for me to air the room regularly because I live next to a street and it's otherwise very noisy, especially at night. After I had unsuccessfully bought sensors for several hundred euros, I was not a step further. With the patches I was finally able to identify an old piece of furniture as the cause and replace it directly. Now my values are much better than before and most importantly the whole process was quick and easy. If I had known about this earlier, I would have saved myself a lot of money.
Samira Cacun
Samira Cacun
Read More
There have been three of us since January and at the beginning there was an unbelievable amount of things to consider when furnishing the children's room. I found out about harmful substances in furniture from a television report and we also had a strange smell. Getting an expert just wouldn't have been possible. We heard about the patches from a friend and tried it out. With the catalog of measures, we finally got the problem under control and are now sleeping much better. 🙂
Marie Lehmann
Marie Lehman
Read More
The patches are fun and it's actually super easy. After my test in my kitchen-living room, I immediately ordered a few extra kits for my parents.

To ask?

Pollupatches bestehen aus einer speziellen Bioplastik, welche große Poren besitzt, in die Schadstoffe wie Formaldehyd eindringen. In dem Inneren des Gels befindet sich ein Bioindikator, welcher sensibel auf Formaldehyd reagiert. Diese Reaktion führt zum Abbau der grünen Färbung und einer Farbänderung in Richtung gelb, orange bis rot. Diese Farbänderung ist einfach mit dem bloßen Auge erkennbar. Die Nachweisreaktion ist dabei so eingestellt, dass erst eine Verfärbung ab einer Konzentration äquivalent zu 0.063 (+/- 10%) mg/m³ Formaldehyd eintritt. 

Ja. Die Patches bestehen nur aus gesundheitlich unbedenklichen Stoffen. Bei der Entwicklung wurde darauf geachtet, dass keinerlei Gefahrstoffe, Gifte oder aggressive Chemikalien eingesetzt werden. 

Der Patch ist jedoch nicht zum Verzehr geeignet und wir raten, die Patches möglichst unzugänglich für Tiere und Kinder aufzubewahren. Vergewissern Sie sich auch, dass sie alle Patches wieder nach der Nutzung entsorgen.

The patches are made of biodegradable materials and can be easily disposed of with normal residual or organic waste. You can also crumble the patches after use and use them as biological fertilizer. 

Beachten Sie bitte, dass es sich dieses Nachweisverfahren lediglich als Orientierungshilfe dient, um eine Orientierung im Raum zu erhalten, wo sich potenzielle Schadstoffquellen befinden. 

Each test kit includes a positive and a negative control. This way you can be sure that the test kit works and that your results are meaningful. Each batch is extensively tested before it is released. Pollu patches are a guide that should help you to get an overview of possible sources of pollution quickly and easily. 
The patch is a good guide, if you are looking for verifiable evidence, we would be happy to advise you on the selection of special sensors and experts.

If you want to find out more about the sensitivity and reproducibility of the test methodology, you can request the data sheet here. 

Since June 2014, the EU has classified formaldehyde as “probably carcinogenic”. Due to the frequent occurrence in our everyday objects and materials, pollutants such as formaldehyde build up in our indoor spaces.

The search for the causes usually takes a long time and is expensive. 

It usually starts with an indefinable smell in the apartment: How a formaldehyde test brings certainty.

We spend over 90 % of our time inside. Air pollutants are up to 10 times more concentrated indoors than outdoors. Formaldehyde was classified by the EU as a suspected carcinogen in 2013, but we still find it in a lot of furniture, wooden building materials, paintwork, carpets and even clothing. It turns out to be a challenge to see the problem at all, after all, air pollutants are invisible. Even electronic sensors are usually not very site-specific and only give a vague statement about the origin of the formaldehyde. The fine electrochemical sensors are often even misled by impurities such as alcohol. 

Our home should be a place of rest and security, free from unnecessary pollution and chemicals. In order to identify pollutants more quickly, we have developed pollu patches for testing formaldehyde. These small patches indicate when formaldehyde is present at unhealthy levels by simply changing color based on the simple traffic light system. In addition, pollupatches are the first biodegradable formaldehyde test that can be used to fertilize plants after use. 


Contact us

Ask us

E-mail kundenservice(ät)pollupatch.com




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