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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 12.7 mm (1/2 in.) and 15.9 mm ( 5/8 in.) thicknesses, Securock® Brand UltraLight Glass-Mat Sheathing is a lightweight, noncombustible, moisture- and mould-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 Securock® Glass-Mat Sheathing at a significantly reduced weight, these panels are warranted for up to 12 months after application.

Main Features

Available in both 1/2 in. regular core and 5/8 in. Firecode X core thicknesses, 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 the exterior finish manufacturer
  • Meet or exceed the requirements of ASTM C1177


  • Administrative Offices
  • Auditoriums and Gymnasiums
  • Bars Restaurants and Dining Areas
  • Department Stores and Boutiques
  • Dormitories
  • Exterior Soffits and Indoor Parking Garage
  • Guest Rooms and Suites
  • Health and Fitness
  • Traditional Offices

Documents & Files

Submittal Sheets & Specifications

Submittal Sheet (English) PDF 2.5 MB

White Papers

Sell Sheet (English) PDF 585.4 KB

Installation & Technical Manuals

Installation Guide (English) PDF 635.1 KB

SDS, Certifications & Reports

SDS (English) PDF 88.2 KB


Warranties (English) PDF 161.0 KB


Product Attribute Report (English) PDF 885.1 KB

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