R-21K 16 in. x 96 in. x 5-1/2 in. InsulPure® Kraft-Faced Fiberglass Insulation (5 Pieces per Pack, 85.33 sq. ft.) | R21K-1696-649781-CT

CertainTeed's InsulPure Kraft-Faced Fiberglass Insulation also enhances indoor air quality by using a sustainable, low-VOC binder technology that reduces airborne particles and irritants. The insulation is designed for friction-fit installation between framing members, making it compatible with standard construction practices. Ideal for new construction and retrofit projects, it meets key fire safety and acoustic control standards, helping to create quieter, safer indoor environments without compromising energy efficiency or installation speed.

• The kraft-faced vapor retarder helps control moisture buildup in insulated cavities
• Formaldehyde-free fiberglass improves indoor air quality and handling comfort
• InsulPure® technology delivers consistent thermal performance over time
• Low-dust formulation supports cleaner, faster installation with minimal irritation
• Designed for friction-fit application between framing in walls, floors, and ceilings