Primary Uses

  • Ideal for commercial and residential applications where moisture may be present to prevent mold growth
  • Perfect for commercial pre-rock installation when the structure is not completely closed in and for residential areas such as bathrooms, basements, laundry rooms and kitchens
  • Use on interiors of exterior walls where moisture is likely to occur
  • Can be used behind tile when allowed by applicable building codes

PABCO GLASS® Interior, with its mold and water-resistant gypsum core encased in a glass fiber mat, offers greater moisture resistance and improved dimensional stability compared to standard gypsum board. The product scores 10 for mold resistance, the highest rating when tested in accordance to ASTM D3273 Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber. The product is specially formulated to withstand extended exposure under normal weather conditions* up to one year. The interior glass-faced panel is noncombustible, dimensionally stable and resists warping, sagging and buckling. It is available in 5/8" Type X, fire-resistant and 1/2" Regular for use in non-fire rated construction.
Made in the USA

*Normal weather conditions is defined as climatic normal weather with usual high and low temperatures, with occasional moderate rain and wind.

Core Thickness Width Length Edge Weight
Interior Regular
1/2” (12.7 mm) 48” (1219 mm)

8' (2334 mm)

12’ (3658 mm)

Tapered 2lbs/ft2
Interior Type X
5/8” (15.8 mm) 48” (1219 mm)

8' (2334 mm)

12’ (3658 mm)

Tapered 2.5lbs/ft2


Core: Gypsum Core Type Options: 
1/2” Regular (UL Core Type: Regular)
5/8” Type X (UL Core Type: PGI)
Paper: 100% glass mat on front, back and long edges



ASTM C1396 part 7, C1658



PABCO Gypsum Installation Instructions
Gypsum Association GA-214, GA-216


Mold/Mildew Resistance ASTM D3273:

10 (Highest Rating)


Water Absorption ASTM C473:

≤5% by weight


Surface Burn ASTM E84:

Flame Spread 0
Smoke Developed 0


Combustibility ASTM E136:


See the Gypsum Association Fire and Acoustic Guide GA-600

Underwriters Laboratories, UL fire Resistance Directory

Sustainably manufactured in Las Vegas, NV from raw material extracted from the same location.
For additional LEED and sustainability information, please contact PABCO Gypsum Technical Services.