K-13 is a high-performance, spray-applied thermal and acoustical finish system engineered for exposed ceiling applications where acoustic control, energy efficiency, and architectural design are key. For over 60 years, K-13 has been a trusted solution for architects and design professionals, providing effective sound absorption that reduces reverberation, improves speech intelligibility, and enhances occupant comfort in environments such as auditoriums, educational facilities, commercial interiors, and open-plan spaces. At the same time, it delivers dependable thermal insulation making it ideal for parking structures, stadiums, and mixed use buildings.
Performance dashboard
Features & functionality
- Integrated thermal and acoustic performance improves energy efficiency, sound control, and occupant comfort
- Adheres to common substrates and to complex or irregular surfaces
- Available in standard and custom colors, allowing for seamless design integration
- Backed by 60+ years of proven use, ensuring long-term durability and reliability across building types
Visit ICC for more information:
K-13 Acoustical Spray, K-13 Thermal Insulation, K-13 High-R System
Environment & materials
Improved by:
- Made from sustainable cellulose fibers, supporting environmentally responsible material selection and green building practices
- GREENGUARD Gold Certified contributing to healthier indoor air quality in occupant-focused environments
- Low-emitting material system supports wellness-centered design strategies and indoor environmental quality goals
- Efficient spray-applied installation minimizes material waste, reducing construction impact and improving project efficiency
Certifications, rating systems & disclosures:
- GREENGUARD Gold (1)
- Health Product Declaration (HPD)
- Environmental product declaration (EPD)
- M1 classification of low emitting building materials
- UL classified
- Cradle to Cradle Certified® Bronze
For spec help, contact us or
call 800.444.1252
K-13 Specificiation
K-13 Parking Garage Specification
K-13 High-R System Specification
How we make it greener
ICC's line of spray-applied systems, consisting of natural, plant-based fibers and specialty, water-based adhesives, are carbon-storing materials that contain over 50% recycled content. Cellulose, the primary raw ingredient, has an exceptional embodied carbon profile and contains wood, cotton, hemp and other rapidly renewable resources. During their useful life, these raw material ingredients sequester carbon reducing the amount of harmful greenhouse gasses in the atmosphere. Cellulose takes less energy to make compared to other building insulation materials.
K-13, SonaSpray, Ure-K, and SonaKrete spray-on systems are M1 Classified as Low Emitting Building Material and are compliant with CDPH/CA Section 01350. They are also GREENGUARD Gold Certified per UL Environmental which ensures that a product has met the most rigorous and comprehensive standards for low emissions of volatile organic compounds (VOCs) into indoor air.
ICC products have met the Living Building Challenge requirement that they do not contain chemicals on the Red List. The Red List contains some of the worst materials prevalent in the building industry; for transparency purposes, ICC has provided an ingredient list for 98% of the total product and all proprietary material chemicals have been disclosed to third party to verify they are non-hazardous. K-13, SonaSpray, Ure-K, and SonaKrete spray-on systems are free of heavy metals such as Lead (Pb), Cadmium (Cd), Mercury (Hg), and Hexavalent Chromium (Cr(VI)) or other metals. Furthermore, there are no ozone depleting substances such as CFC’s/HCFCs, Isocyanate or any Brominated Flame Retardants (PBTs).
K-13, SonaSpray, Ure-K, and SonaKrete are manufactured in the United States under the ISO 9001:2015 Quality Management System by International Cellulose Corporation in Houston Texas. Adhesives are produced and shipped in concentrated forms and are diluted with water sourced from the job site. Local sourcing and manufacturing allow for a reduction in transportation costs and emissions.
International Cellulose Corporation’s thermal and acoustical finish systems are spray-applied to common substrates through specialized equipment using approved application techniques. ICC's products are installed by a network of licensed applicators, trained by ICC and supported by their field services team. During the installation, fibers and adhesives are combined forming a durable, monolithic coating over the substrate.
How we’re making it greener and healthier
K-13 is designed to support healthier indoor environments while advancing sustainable building practices. Manufactured from recycled cellulose, K-13 utilizes responsibly sourced materials that reduce reliance on resource-intensive alternatives. Its GREENGUARD Gold Certification verifies low chemical emissions, helping protect indoor air quality and supporting occupant wellness in schools, healthcare facilities, workplaces, and public environments.
In addition to material sustainability, K-13 enhances long-term building performance by combining thermal insulation and sound absorption in a single system. This integrated approach improves energy efficiency while reducing the need for additional finish materials, lowering overall environmental impact. Its durable, spray-applied application minimizes material waste and supports extended service life, contributing to lifecycle sustainability.
K-13 is also part of a broader commitment to material transparency and responsible manufacturing, including certifications such as Cradle to Cradle Certified® that demonstrate safer material chemistry and circular design principles. These attributes empower architects and building owners to specify a solution that supports both environmental responsibility and occupant well-being without compromising performance or aesthetics.
SM Performance Fact Sheet ™
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International Cellulose Corporation
12315 Robin Blvd.
Houston, TX 77045
www.spray-on.com
(800) 444-1252