Europe tests 284°F self-repairing material for reusable spacecraft

Europe is currently behind the US and China in reusable space technology, with its most powerful rocket, Ariane 6, being fully expendable. To help close this gap, Swiss company CompPair, in collaboration with the European Space Agency (ESA), is developing a self-healing composite material called HealTech. This material autonomously repairs damage when heated to between 100–140°C (212°F-284°F), activated by an embedded healing agent. HealTech integrates fiber-optic sensors and 3D-printed aluminum heating grids to detect damage and trigger self-repair, potentially extending spacecraft lifetimes and enabling more durable reusable space infrastructure. HealTech is being tested under ESA’s Project Cassandra, part of the Future Innovation Research in Space Transportation (FIRST!) initiative, which aims to develop advanced materials for European space vehicles. Composite materials like carbon fiber-reinforced polymers are lightweight and corrosion-resistant but vulnerable to damage that worsens over time, especially under repeated use. The self-healing capability of