It is a primer applied to the edges of the plate in drywall systems to prevent dusting.
Knauf Fireboard® is a joint sealant used in joints of plasterboard types.
Gypsum plasterboard is a horizontally applied carrier profile which is applied vertically in Gypsum Board and Wall Cladding Systems.
The main and secondary carriers in Gypsum Board Suspended Ceiling Systems; It is the profile used as the main carrier in walled wall cladding systems.