Star-Navi XRAM-C

A Chinese firm selling radar-stealth "by the kilogram" — Star-Navi's XRAM-C spray-on radar-absorbing coating, available off the shelf in 1, 5 and 10 kilogram tubs. The headline performance claim is modest, but the significance is the commoditization: a capability once reserved for billion-dollar stealth platforms, applied with a spray gun to throwaway drones.

Overview

XRAM-C is a series of spray-on radar-absorbing material (RAM) coatings marketed by Star-Navi, a Shenzhen-based Chinese company. It is a black-gray liquid sprayed onto a prepared surface and cured; it works by absorbing incoming radar energy and shedding it as heat rather than reflecting it back, trimming a platform's radar cross-section so air-defense radars get a weaker return. What makes it notable is not the physics but the packaging: Star-Navi sells the coating commercially by weight, in 1, 5 and 10 kilogram containers, applied with ordinary spray equipment and no specialized factory, as Defence Blog reported. It is a material, not a platform — included in the Lexicon because the off-the-shelf sale of even a modest stealth treatment matters for the cheap, mass-produced drones that now dominate the Ukraine and Russia battlefields, and because it fits China's longer-term push to mass-produce low-cost radar-absorbing materials.

Development

Star-Navi released the XRAM-C Series commercially in 2026, presenting it as the "commercial maturation" of a capability advanced militaries had guarded for decades, per Defence Blog. The product line arrived amid a broader Chinese effort to drive radar-absorbing materials toward cheap mass production: a Foshan University team, for example, published a peer-reviewed paper in April 2026 describing a low-cost microwave absorber built from expanded graphite and titanium dioxide rather than expensive graphene or carbon nanotubes, explicitly aimed at feasible mass production, as the South China Morning Post reported. Star-Navi's commercial coating and that academic pipeline are two faces of the same trend — the falling cost of signature reduction.

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