Solar absorber coatings and surfaces

We manufacture a wide range of highly advanced absorption coatings, which are available on a choice of metal substrates. These offer unique combinations of thermal or solar energy absorption, with extremely low thermal emissivity.

Selective absorber coatings for aluminium or copper strips

As a leading solar absorber surfaces specialist in the UK and across the globe, our thermal absorption surfaces have been fine-tuned over the years to offer industry-leading absorption performance. Our selective absorber coatings have solar absorption rates of up to 97% and emission rates as low as 4%. This is all backed by a 10-year outdoor material warranty.

eta Plus®

eta plus® is our semi-finished product for solar thermal systems and is used in absorbers for flat-plate collectors with full-surface or strip absorbers, in tube collectors as well as in air and large-scale façade collectors. In addition, it facilitates the production of high-performance collectors for solar cooling and the generation of process heat.

eta plus® achieves a very high solar absorption of 96% – combined with a very low thermal emissivity of just 4%. Based upon an aluminium or copper strip, the innovative absorber layer system is applied using a continuous PVD method in a worldwide technologically unique air-vacuum-air process.



Our special mirotherm® coating is ideal for solar thermal systems and absorbs both direct sunlight and diffuse radiation. Based upon an aluminium strip, an innovative three-layer absorber system is applied using a continuous PVD method in a worldwide technologically unique air-vacuum-air process. Whilst the IR reflective layer ensures low thermal emissivity, the oxide absorption and antireflection coatings provide maximum solar absorption and resistance to external influences. In addition, mirotherm® has a laser-weldable anti-corrosion coating.

mirosol® TS

mirosol® TS is the ideal material for solar thermal systems installed in regions with high solar radiation. During the manufacture of mirosol® TS, a selective, hydrophobic lacquer is applied to aluminium in a specially developed process.

This means that for the first time, in addition to PVD coatings, lacquers using the coil coating method are now also available for solar thermal collectors.

mirosol® TS is unique thanks to its high resistance to heavy environmental pollution, salty air, moisture, condensation, oil and dirt as well as a low stagnation temperature.

mirotherm® Control

Developed on the basis of our best-selling and established coating mirotherm®, mirotherm® Control offers all the advantages of the proven system: solar absorption up to 96%, highest product quality, resistance to external influences such as moisture and integrated protection against overheating.


Solar infographic

With Government policies driving investment in all kinds of renewables, the efficacy of solar energy generation is rising to the top of many agendas, and is something of vital importance to profitability.

View our infographic which looks at how solar absorption and reflection can help the UK drive change in commercial and consumer energy markets.

Reflective Metal Surfaces

We have the most comprehensive range of reflective metal surfaces and materials available from any supplier.

Decorative Metal Surfaces

Our decorative metal surfaces offer exciting design solutions for both internal and external applications.

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