Gypsemna’s SOUND PROTECT (SP – 12.5mm) Type X Gypsum Board is an interior gypsum board consisting of a solid set, fire-resistive, Type X gypsum core enclosed in PURPLE-colored face paper and a strong liner back paper. Gypsemna’s SP Type X board features a specially formulated core providing acoustic ratings when used in tested assemblies. Long edges are slightly tapered, allowing joints to be reinforced and concealed with joint tape and joint compound. The face paper and the back paper are 100 percent recycled.