CompPair, Diab partnership validates healable composite sandwich structures

CompPair Technologies Ltd. (Lausanne, Switzerland) announces a cooperation agreement with core materials provider Diab (Laholm, Sweden). The partnership focuses on healable sandwich structures, combining Diab’s Divinycell core materials with CompPair’s HealTech ultra-fast composite repair technology. These solutions make it possible to recover from impact and target both exterior and interior aerospace applications, and a wide range of industrial and mobility solutions, improving durability and reducing repair time and maintenance costs.

Diab has long led the development and commercialization of foam core materials for composite sandwich panels, while CompPair brings extensive experience in healable composites and their integration with various core structures. Since 2025, the two companies have collaborated to combine CompPair’s healable skins with Diab’s foam cores for applications where durability, repairability and performance are essential. 

The collaboration has already validated the healing value of CompPair’s HealTech solutions and their compatibility with a wide range of sandwich structures using Divinycell foam cores, including HT (PVC), F (PES) and PR (PET) categories. Typical applications include aircraft interior panels, aircraft fairings, radomes and sandwich body panels for trucks and caravaning. Common impact scenarios include hail and luggage impacts as well as tool drops, occurring during manufacturing or in service. The different use cases and healing methods have been validated through impact testing at various energy levels, mechanical testing and fire testing in line with industry requirements.

Across these use cases, the material systems demonstrated strong and consistent technical performance, including effective healing behavior, reliable skin adhesion with cohesive foam failure and robust flammability performance. The ultra-fast repair procedure enables rapid restoration of structural performance, significantly reducing maintenance costs, downtime and operational disruption, while also delivering environmental benefits through extended component lifetime.

Looking ahead, Diab and CompPair will continue to advance new commercial applications of healable composite solutions, unlocking greater operational efficiency and enhanced material performance.