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Nu-Wool WALLSEAL Fire & Sound Insulation delivers high-performance fire protection, sound control, and energy efficiency in a single, sustainable solution. Designed specifically for firewall applications, it provides the same superior thermal and acoustic performance as Nu-Wool Premium Cellulose while meeting the demands of UL-listed firewall systems.
Its high-density cellulose construction slows the spread of fire by limiting oxygen, improves sound attenuation, and fully fills wall cavities to eliminate air gaps and odor transfer. WALLSEAL is approved for use in the UL-U382 firewall system and more than 50 additional UL-listed designs, meeting ANSI/UL 263 and ASTM E-119 requirements—even with fewer layers of gypsum board.
Nu-Wool WALLSEAL Fire & Sound Insulation delivers high-performance fire protection, sound control, and energy efficiency in a single, sustainable solution. Designed specifically for firewall applications, it provides the same superior thermal and acoustic performance as Nu-Wool Premium Cellulose while meeting the demands of UL-listed firewall systems.
Its high-density cellulose construction slows the spread of fire by limiting oxygen, improves sound attenuation, and fully fills wall cavities to eliminate air gaps and odor transfer. WALLSEAL is approved for use in the UL-U382 firewall system and more than 50 additional UL-listed designs, meeting ANSI/UL 263 and ASTM E-119 requirements—even with fewer layers of gypsum board.