USG Securock® Brand UltraLight Glass-Mat Sheathing (Regular and Firecode® X)

High-performing, lightweight sheathing that’s designed to give your productivity a boost.

Available in 1/2 in. and 5/8 in. thicknesses, USG Securock® Brand UltraLight Glass-Mat Sheathing is a lightweight, noncombustible, moisture- and mold-resistant panel designed for use under exterior cladding where conventional gypsum sheathing products have traditionally been used. Formulated to achieve all the strength and performance characteristics as standard USG Securock® Glass-Mat Sheathing at a significantly reduced weight, these panels are warranted for up to 12 months after application.

Customer Service Center
1-800-950-3839
7 a.m. - 6 p.m. CT, Mon - Fri

USG4YOU Tech Support
1-800-USG4YOU (1-800-874-4968)
7:30 a.m. - 4 p.m. CT, Mon - Fri

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features and benefits

Available in both 1/2 in. and 5/8 in. thicknesses, USG Securock® Brand UltraLight Glass-Mat Sheathing feature:

  • The lightest 1/2 in. and 5/8 in. glass-mat sheathing available—up to 15% lighter than other glass-mat sheathings
  • Improved coated fiberglass facer mat to maximize coverage of air/water barrier systems
  • Treated gypsum core, combined with fiberglass face and back, offers exceptional water resistance
  • Score and snap easily for quick installation
  • For use in most exterior systems when properly detailed by exterior finish manufacturer
  • GREENGUARD Gold certified and qualifies as a low VOC emitting material (meets CA 01350)
  • Meet or exceed the requirements of ASTM C1177

Customer Service Center
1-800-950-3839
7 a.m. - 6 p.m. CT, Mon - Fri

USG4YOU Tech Support
1-800-USG4YOU (1-800-874-4968)
7:30 a.m. - 4 p.m. CT, Mon - Fri

Email USG Technical Support

Design & Specification
Assistance
Find your local architectural representative