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What is a shading agent?

Shading agent
Written by Roger de Jagher | Last update: 20-05-2022

Shading agents reflect the light of the sun and thereby improve the climate in the greenhouse. Not many crops can bear full sun or high temperatures. This is where a greenhouse shading paint can offer protection. The crops in the greenhouse can be protected with a layer of chalk, to reflect light and heat in the summer. This prevents climate peaks within the greenhouse, protection the crop throughout the entire season. 

Improvement of the greenhouse's climate 

The greenhouse shading paint reflects light and lowers the temperature in the greenhouse. As a result, less evaporation within the crop occurs, preventing the plant from drying out and hanging loosely. It can be stated; the greenhouse shading paint improves the climate in the greenhouse. Eventually, this leads to less stress for the crop and a better result. Do you have a specific question about shading agents? Our specialists are ready to answer all your questions.

Video: shading agents

Video: Q4 and Q3

Preventing roof-ridge wear off

The roof-ridge is very important in greenhouse shading, as this part of the greenhouse gets the most sun, from morning to evening. Wear marks on the ridge are therefore very detrimental to the crop and should be minimized. The ridge of the roof is also affected by rain, hail and wind and it is therefore crucial that the ridge is properly covered.  For this, you can use a high-quality greenhouse shading product which is wear-resistant. It is also possible to chalk (meaning: apply greenhouse shading paint) several times with a relatively cheaper product, which is less wear resistant. It is recommended to always ask for advice when choosing a specific product. 

Geen nokslijtage


No signs of roof-ridge wear

Signs of roof-ridge wear

Apply greenhouse shading paint

Most growers apply shading paint using a machine like the Top Cleaner. This guarantees a correct application of the product, in the right quantity. If you choose to spray coatings fully automatic, no one has to ride along an no one can fall. It is a safe way of applying greenhouse shading paint. With a small expansion, the machine can also be used to apply a layer of chalk or coating. We can also deliver rails and a movement platform if desired.

Shading Agents

What is a diffuse coating?

Diffusion coatings ensure that the light in the greenhouse is better distributed, both horizontally and vertically. As a result, there are no longer any light or dark areas. The advantage is that the crop experiences less stress and grows better. In addition, the light penetrates deeper into the crop. This increase in light makes the leaves much more active further down the crop.

Video: How does a diffuse coating work?

What is the difference between a shading agent and a diffuse coating?

The difference between shading agents and diffuse coatings is that shading agents provide reflection and diffuse coatings provide transmission. So shading agents help you reduce greenhouse temperatures by reflecting light. Diffuse coatings scatter sunlight over a larger area and thus simultaneously "distribute" radiant energy over a larger surface.

Overview of properties shading agents vs diffuse coatings

Shading agent
Diffuse coating
Reflects excessive sunlight through shading

Prevents shadow formation through light diffusion

Reduces greenhouse temperature

Reduces plant temperature

Becomes transparent when wet
Adjustable shading percentage

Ensures an even temperature distribution in the crop

Only Temperzon T74 has this property

What are the benefits of diffuse coatings?

By highly diffusing incoming sunlight up to three times more valuable photosynthetically active radiation (PAR) will reach the middle a bottom parts of the crop and eliminates shadow formation of the greenhouse construction. All this ensures a higher reception of light in the greenhouse which in turn leads to more and better growth of crop and fruit. In floriculture diffused light has proven to lead to more growth and in the cultivation of vegetable crops it has shown to increase production and at the same time improve fruit quality. In the video below, the effect of diffuse light is explained.

Diffuse coatings



Whitepaper: Shading agents and diffuse coatings

Shading agents
Many crops cannot withstand full sun, high temperatures, or both. In that case, a chalk agent or diffuse coating is the solution. But which product is most suitable for your crop? And how do you use it? You will find al the answers in this whitepaper!


Meer informatie

More information about different shading agents or diffuse coatings?

Do you have any questions about crop care, or would you like advice? Then contact one of our crop protection specialists, or ask your question using the form below. We'll respond within 24 hours on working days.

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Roger de JagherAbout Roger de Jagher

Roger is our shading specialist and has over 30 years of experience in horticulture and extensive knowledge in the field of shading and coating materials. Because of his many travels Roger knows almost every aspect of his field and is therefore able to give personal advice. His advice is optimally suited to the objectives of the grower, the crop, the weather, the greenhouse and the environment. Roger understands the customer's situation, is aware of what is going on in the sector and thinks with the customer to find the best shading solution.

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