What’s the difference between a shading agent and a diffuse coating?

During warm and sunny periods many crops need a little help to continue a strong growth. Eventhough sunlight is essential for photosynthesis and growth of all plants, too much sunlight in spring and summer can lead to burning and stress symptoms in a lot of crops. To prevent this from happening, growers protect their crop during these periods by applying a shading agent or diffuse coating on the roof of their greenhouse. These products are designed to reflect and keep out excessive sunlight and heat from the greenhouse (shading agent) or to prevent damaging by diffusing incoming sunlight as much as possible (diffuse coating).

Shading agents offer reflection

Shading agents reduce the temperature inside the greenhouse by partially reflecting sunlight. This prevents peaks in the greenhouse climate and results in a more stable growing climate. In this way shading agents offer full protection throughout the season and prevent light stress symptoms and damaging of fruit and crop caused by light burn.

Diffuse coatings offer transmission

In contrast to shading agents diffuse coatings are intended to let through as much light as possible. Instead of reflection coatings offer transmission. It scatters sunlight over a bigger/larger surface and by this it simultaneously ‘divides’ the radiant energy over a larger surface. 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.


Shading agent
Diffuse coatings
Reflects excessive sunlight through shading


Prevents shadow formation through light diffusion


Reduces greenhouse temperature


Reduces plant temperature


Becomes transparent when wet
 (Only Temperzon T74)
Adjustable shading percentage


Ensures an even temperature distribution in the crop




Shading agent and diffuse coating
Personal advice

Every crop and greenhouse has different needs and therefore requires a different approach. Product specialists Richard Hagedoorn and Gai Vegter would be happy to provide personal advise to suit the needs of your crop and greenhouse. Click here to contact our specialists, or fill in the form below. 


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