The fire rating board is consist of non-combustible core, composed primarily of gypsum  or cement and surfacing on a paper as a face. The construction of system of the fire rating board is called drywall and some time they name it as plasterboard or cement board. The framing system is normally form with aluminium channel, steel hollow section and in-fill ( or sandwich)  with rockwool in order to archive the required fire rating hour.

The surface which is finished with a paper can be easily painted in any time of paint.

The different product and system is required to follow strictly on the manufacturer detail as tested on the type of framing being used, spacing of the stud, thickness of the board in order to meet the requirement and certify by the Engineers.

All the fire rated safety products and materials are regulated in Singapore by the Singapore Civil Defence Force ( SCDF). Only approved material and system by the SCDF can be used before obtained the certification.

Reference: http://fireproofingsys.com/fire-rated-board-system/