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Item: 221800

Sheetrock® Brand Glass-Mat Liner Panels Mold Tough®

Economical Type SLX glass-mat liner panels with superior moisture-and mold-resistance, panels come with a 12-month exposure warranty

Available Product Options

Thickness: 1 inch

Width: 24 inch

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Sheetrock® Brand Glass-Mat Liner Panels Mold Tough® are designed and tested for use with Sheetrock® Brand Cavity Shaft Wall System and USG Area Separation Wall System steel framing components. The liner panels come with a 12-month exposure warranty. Product substitutions are not recommended or supported by USG.

Main Features

High-performance glass-mat liner panels with moisture- and mold-resistance for use in USG Shaft Wall and Area Separation wall systems.
  • Direct substitute for Sheetrock® Brand Gypsum Liner Panels and Sheetrock® Brand Mold Tough® Gypsum Liner Panels when prolonged weather exposure is anticipated.
  • UL Classified as to fire resistance, surface burning characteristics, and noncombustibility.
  • Comprehensive product and system testing ensure long-term performance and safety.
  • Available in 8-, 10- and 12-foot standard lengths. Other lengths available by special order.


  • Multi-Family Residential and Condos
  • Stairways and Elevator Shafts


Submittal Sheet PDF 686.2 KB


  • Mold & Mildew Resistance
    Contains a broad-spectrum antimicrobial additive on the face and back of the panel that provides resistance against the growth of mold and mildew. Includes sag-resistance performance.
  • Fire Resistance
    • Fire Rating Firecode®
  • ASTM Classification ASTM C1177; ASTM C1396; ASTM D3273


  • GREENGUARD Certification
    GREENGUARD Certification helps consumers choose building materials with lower VOC (volatile organic compound) emissions, which improves indoor air quality.

Physical Data

  • Thickness (in.) 1
  • Edge Beveled Edge
  • Panel Size 24" x 8-14'

Documents & Files

Submittal Sheets & Specifications

Submittal Sheet (English) PDF 686.2 KB
Architectural Specification (English) DOCX 68.7 KB

Catalogs & Brochures

System Catalog (English) PDF 14.7 MB

Installation & Technical Manuals

Installation Guide (English) PDF 463.3 KB

SDS, Certifications & Reports

SDS (English) PDF 163.7 KB
SDS (Spanish) PDF 153.6 KB


Warranties (English) PDF 123.3 KB

Ask a question

Our customer support team will get back to you within 48 hours

Question Guidlines

  • Questions should relate to this product specifically.
  • For help with pricing, availability, or delivery, please call 800.874.4968 (Monday–Friday, 7am–6pm Central)
  • All questions and answers follow USG’s Terms & Conditions.
  • Your question and USG’s answer may be posted to this page in the future, but none of your personal info will be included.

q & a

  • Do Sheetrock® Brand Glass-Mat Liner Panels offer an exposure warranty?

    They offer a 12-month exposure warranty, and they can be used in any fire-rated cavity shaft wall and separation wall system assembly.

  • Have a question?

    Let us do research and get back to you (usually within 48 hours).

    Ask USG
  • Need help right away?

    Call our Technical Support team at 800-874-4968 (Monday-Friday, 7am-6pm Central).