About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

Klarberg
Drain cleaner

With its drain cleaner, the manufacturer Klarberg offers a powerful and solid product. In our test, we were particularly impressed by the functionality of the cleaner. In addition, thanks to its composition, the cleaner can be used for all pipe materials and drains and therefore offers the maximum flexibility you could wish for from such a product. The safety cap used offers additional safety against leaks or in relation to small children.
The product is only criticised in terms of dosage, as the advertised “up to 15 applications per bottle” with a total volume of one litre and the recommended “100 ml for light blockages” cannot be achieved in purely mathematical terms.
Overall, however, we are impressed by the handling and effectiveness of the product, which is the reason for our very good rating.

  • Flexible for all pipework
  • Odourless
  • Pollutant-free
  • strong effect
  • Dosage contradictory, no unit of measurement attached

The first impression

Packaging and contents

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

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Product protection

Bottle is stable, product sufficiently protected

100

Points

Sustainability Packaging

Unnecessary packaging waste has been avoided, the plastic bottle is necessary

100

Points

Package contents & scope

Completely available

100

Points

Instructions for use

Printed on the bottle to conserve resources

100

Points

TOTAL

100

Points

Weighting: 20%
*Themaximum score is 100 points

At first glance, the Klarberg brand drain cleaner cuts a fine figure. An attractive and simple bottle in a greenish design makes a good visual impression thanks to the high-quality labelling. The packaging also looks solid and robust to the touch, so that leakage can be ruled out when used properly. The use of a plastic bottle is essential due to the liquid inside and is required for safe transport. Therefore, the use of plastic is not taken into account in terms of sustainability. Additional packaging such as a cardboard box or similar is not used, which we consider to be sensible and resource-saving. Nevertheless, product protection is fully guaranteed.
Comprehensive instructions for use and warnings in five different languages can also be found on the bottle label, so that no further resources are wasted here either.

The first time in your hand

Product processing and appearance

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

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Visual appearance

Simple and functional design

100

Points

Processing

Good material quality

100

Points

Stability

Very stable

100

Points

Sustainability of the product

No details, but use of high-quality materials

70

Points

TOTAL

93

Points

Weighting: 20%
*Themaximum score is 100 points

The product is also impressive on closer inspection.
The first thing you notice when opening the bottle is the safety cap. This not only prevents the bottle from leaking but also offers additional protection for households with small children. However, as with other closures of this type, the bottle can be opened with a combination of pressing and twisting at the same time.
As advertised by the manufacturer, the product itself proves to be surprisingly odourless. Although not completely “odourless”, no pungent, chemical smell can be detected, unlike competing products.
Unfortunately, the manufacturer does not provide any information regarding the sustainability of the product. Details on the production of the product, information on CO2 compensation measures or other certifications would be desirable.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

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Utilisation

Simple and self-explanatory use

100

Points

Functionality

Powerful, highly alkaline cleaner

100

Points

Flexibility

Can be used for all pipe systems and materials

100

Points

Dosage

Recommendation contradicts advertising claims, unit of measurement or dosage measure on the bottle desirable

75

Points

Security

Safety closure against leakage, protects small children

100

Points

TOTAL

95

Points

Weighting: 45%
*Themaximum score is 100 points

The practical test of the Klarberg drain cleaner can be summarised as successful and very simple.
For our test, we treated a shower drain and a sink drain according to the instructions for use. This first involves a brief pre-rinse with hot water. The desired amount of cleaner is then poured into the drain, depending on the degree of blockage. After a certain time, the drain can then be rinsed or reused. For light blockages, 20-60 minutes exposure time and 100ml of cleaner are sufficient; for heavy blockages, the manufacturer recommends 200ml and overnight exposure. We have tried both on the objects mentioned above. The results are impressive. On the one hand, there was a noticeable improvement in water drainage . On the other hand, there were no more bad odours from the drain. As the manufacturer claims that the cleaner is suitable for all pipe materials, the product offers not only excellent performance but also maximum flexibility in use.
The only thing we are not completely convinced of in our test is the dosage . The small size of the bottle head allows for relatively precise pouring. For even easier use, an enclosed measuring unit or a transparent marker along the bottle would be desirable so that the fill level could be seen and measured. We used our own unit of measurement for our test.
The manufacturer also advertises “up to 15 applications” on the label. Even with the lowest recommended dosage of 100ml for light blockages, only 10 applications are possible with 1000ml of cleaner, which we consider to be rather misleading.
On a positive note, however, the cap remains stable even after repeated opening and closing. With regard to the safety of the product and in general, we can therefore speak of a successful and functional product.

Price/performance ratio

and ratings from consumers

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

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Price / performance ratio

Very good performance in the lower price segment

90

Points

Rating cut

without rating

TOTAL

90

Points

Weighting: 15%
*Themaximum score is 100 points

This product does not yet have a sufficient number of ratings and reviews on other platforms. This part of the rating is therefore omitted.

Prices of up to €19.99 are charged on the Internet for equivalent products. Very cheap products are available from as little as €3.75 . The Klarberg drain cleaner is therefore currently in the lower price segment with a price of €9.95. For the quality and performance received, the price-performance ratio is very good.

Overall result

1. packaging & contents

20%

100

Points

2. product processing & appearance

20%

93

Points

3. in the practical test

45%

95

Points

4. price/performance & consumer reviews

15%

90

Points

TOTAL

95

Points

*Themaximum score is 100 points

Drain cleaner
of the brand
Klarberg
achieved
95
Points in our test and therefore passed. The test was carried out in the test period
05/24
and is stored in our database under the licence number
240430001
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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