The Type C board has a core essentially made of gypsum, reinforced with fibers that are resistant to high temperatures and special additives for more resistance and performance against traditional fireproof products.
Type C board is covered on both sides with 100% recycled paper. The paper on its front side covers the entire length of the beveled edges of the board for greater strength and protection of the core. The edges are carefully ground in a square cut.
This product has Greenguard and Greenguard Gold Certification for its low VOC levels and is friendly with humans and the environment. Product is rated by Underwriters Laboratories Inc, and rated based on standards ASTM C-1396, E-119 and E-84.