ALTRA FLEX®

The 1st European oxide ceramic continuous fiber

First in Europe – and quality: Based on its unique experience with high-quality refractory products, RATH has developed an oxide ceramic continuous fiber that goes beyond conventional ideas. With ALTRA FLEX®, RATH is the first European manufacturer and supplier of oxide ceramic continuous fibers in K99 and M75 quality.

Benefit from high-end advantages

Higher temperatures

Strength and flexibility up to 1200 °C

ALTRA FLEX® is unsurpassed in the industry and maintains both strength and flexibility up to 1200 °C. In addition, the fiber offers high thermal shock resistance, excellent dimensional stability and low thermal conductivity.

Endless Possibilities

Ideal for versatile applications

The properties, above all the retention of flexibility in extreme temperature ranges, open up many possibilities. The roving is ideal for fabrics, 3D printing, composites, weaving, braiding and more. This makes it a future-oriented material in many industries and fields of application.

German Quality

The best for the best

ALTRA FLEX® is developed and manufactured by RATH in Germany. This makes RATH the first European quality partner for composite manufacturers and manufacturers and processors of temperature-resistant fabrics.


ALTRA FLEX® is a product of RATH Research and Development. RATH develops its products in-house to meet the company's high standards without compromise.

ALTRA FLEX® is manufactured at the RATH plant in Mönchengladbach/GER under the strictest quality controls and is constantly tested in our own laboratory and by third parties.