The stages of development of a new material and a technology for solar collectors are described. Pipes for parabolic-trough solar collectors (PTSC) must be able to withstand high temperatures for a long time without changing their microstructure and losing their original thermal characteristics. The scientists from the Institute of Silicate Materials (Riga Technical University) together with a specialist from the Institute of Solid State Physics (University of Latvia) have developed a technology that allows the production of PTSC solar-absorbing materials capable of withstanding 600 °C temperatures for at least 250 days. This material is based on glass-crystalline enamel coating on tubular stainless steel pipes. The high-temperature resistance was ensured not only by specific additives added to the frit of enamel coating, but also by a nanosized sol-gel coating over the enamel.