It is a primer applied to the edges of the plate in drywall systems to prevent dusting.
It is a special Gypsum Board type which is covered with glass fibre mattress and has fire resistance for up to 3 hours.
It is a special drywall type which has high sound insulation and can be applied quickly and easily. The front and back sides are covered with brown paper.
It is a joint filler plaster used to fill joints in gypsum plasterboard joints.