Vertical Aerospace (EVTL) said Monday it has agreed to another long-term supplier partnership with Syensqo.

Financial terms were not disclosed.

Syensqo makes composite and adhesive materials that will be used for the VX4 aircraft, which is targeting certification in 2028, the company said.

Vertical Aerospace said it will integrate Syensqo materials into the entire structure of the VX4. The airframe itself will be manufactured by Aciturri, another supplier.

The company said it plans to unveil the new aircraft design on Wednesday.