Gold Bond® BRAND eXP® Shaftliner is a moisture and mold resistant shaftliner panel with a fire-resistant Type X core. eXP Shaftliner is manufactured with an enhanced moisture and mold resistant core and facers. The facers, with PURPLE® color, are composed of a coated fiberglass mat which provides superior weather resistant capabilities. eXP Shaftliner is specially coated on the front, back and edges for easy handling. Long edges of panels are beveled for ease of installation.