Optimizing fiber optic cable telecommunications

UV-curable coatings for fiber optic telecommunications

At Covestro we are the world’s leading supplier of UV-curable coatings for optical fiber materials used in the telecoms industry. 

We also create UV-curable coatings, inks, matrix materials, tight buffer materials, splicing compounds and specialty fiber coatings for optical cable and fiber. The result: high-quality and reliable applications for optical fiber built on 40 years’ experience of working with fiber makers, cable producers and telecom partners to meet the ever-changing needs of a digitalized world. 

We believe in a Future of Community that will connect all people

The world is on the verge of a new era. One where people and their devices are all interconnected. The more we connect, the more creative people become, the more prosperous societies grow and the closer people feel with one another.

At the heart of this connectivity is fiber. We provide the advanced optical fiber coatings that ensure that your connection can perform to its full potential. Covestro is in a key position to introduce science that will help shape the future. And help connect the billions who remain without a fast connection or any connection at all. One day in the future, the entire world will be connected in a single, global community. We’re focused on making that Future of Community happen sooner rather than later – quite literally at the speed of light.

Benefits of our UV-coatings

Fibers coated with our innovative materials deliver outstanding performance, including low micro-bending, excellent field performance, and design flexibility. We enable fiber and cable manufacturers to work with very delicate strands of glass fiber about the size of a human hair; and fibers with our coatings can carry signals at super-fast speeds with minimal interruption or distortion.

Benefits for consumers                       


Our LED curing capabilities for optical fiber coatings can help you realize energy savings of up to 80% - all supported by 40 years of technical experience, research and development. They also deliver greater reliability and higher performing networks based on microbending performance (see below).

Covestro optical fiber coatings also help you design more challenging and ‘fiber dense’ designs - with in turn creating new market opportunities, including large effective area fiber (LEAF).

They enable super-high-speed fiber draw for faster fiber production, requiring less Helium (less raw material cost for fiber producers) and faster cure times.

And don’t forget: Covestro optical fiber coatings deliver industry leading aging and durability, excellent reliability and coating performance -- even in extreme temperatures. 

Microbending (and how to tackle it)

Microbending happens when small bends in the fiber axis cause attenuation and signal transmission loss. This is usually caused by fiber being forced onto cabling materials and fiber-to-fiber contacting points, or fiber being pressed onto a rough surface. 

It’s a major challenge for the industry, but the quality of a field-tested coating system can make a huge difference in tackling microbending performance. For example, our DeSolite®, Cablelite® and Bufferlite® materials have been in the field for over 30 years now - protecting fiber from environmental field stresses while ensuring signal reliability. And they’re still running strong!


You benefit from the energy-saving qualities of up to 80% with the LED curing technology used for Covestro optical fiber coatings, inks and matrix for inking the fibers and producing ribbons. 

Our optical fiber coatings improve overall fiber quality with superior protection (of the fiber itself) – and they give you greater flexibility in optical cable design by enabling a higher cable count, for example.

What’s more, our optical fiber coatings enable a higher fiber count, including for large effective area applications – as well as a high quality ‘inking’ of the fiber and more consistent performance when producing the ribbon. 


When you choose Covestro optical fiber coatings you can be assured of the highest safety, quality, and environmental standards. In fact, some two billion km of fiber (over 50% of the installed fiber on the earth’s surface) today is coated with our products – supported by more than 40 years of innovation and experience in fiber optic telecommunications.

Our optical fiber coatings reduce (TLC) total lifetime costs with a longer fiber lifespan of 25 years-plus. In fact, Covestro optical fiber coatings are proven to drive greater reliability and higher performing networks as measured through microbending (see below) – with a lower risk of network failure - even in extremely cold temperatures.


Because they reduce energy consumption by up to 80%, our LED-enabled fiber optic coatings are helping to reduce the environmental impact of the telecommunications industry, lowering the carbon footprint of manufacturers.

By enabling a more connected world, we’re contributing to economic and personal growth and the spread of knowledge - as well as easier access to medical advice and care. ‘Connectivity’ really does have the potential to increase social happiness, productivity and physical wellbeing – for all.


Our high-performance coatings protect optical fiber that’s as thin as a human hair – enabling optical fiber networks to perform for decades.


Our coatings and inks for fiber optic telecommunications deliver proven protection and performance.

DeSolite® coatings

Optical fiber coatings for high-speed production and superior fiber attenuation performance. 

Bufferlite® coatings

High-performance materials for upjacketing optical fiber via a fast, one step process. 

Cablelite® inks and matrix

Fast-curing inks optimized for loose tube and ribbon designs in optical fiber cables.


Our UV LED cure coating technology enables you to radically reduce the energy consumption of the coating manufacturing process – by up to 80% compared to conventional microwave lens heat production systems.   

Could we help you solve your coating challenge?

No matter what the application, substrate or technology, there’s a good chance our team can help you.