Yellow Nanite foam
An ingenious product of Union Space technology and part of every emergency tool kit.
Nanite Foam is used to emergency seal hull breaches on space ships.
The foam is bright yellow, primarily so repair crews can find the damaged area.
Technical nanites are sprayed around the edges of a breach and the little robots immideatly swarm out to gather any material and use it to create more nanites that cling to each other until the hole, crack is sealed.
Yellow Nanite foam can safely be used for emergency repairs on space suits as no organic materials are gathered.