• Board type DI certified according to EN 520
• Special perforated board designed to meet sound insulation requirements in interior drywall construction
• Available with square and circular perforation in different patterns
• Longitudinal tapered edge board for an easy application with regular flat boards
• Incorporated with white acoustic veil on the back surface of the board
• Paper: 100% recycled, blue color
• Core: dimensionally stable and non-combustible inert gypsum