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ToughRock® Mold-Guard Gypsum Board

Moisture-resistant gypsum board provides extra protection against mold and mildew compared to traditional paper-faced gypsum wallboard products in high humidity areas.

Available as 1⁄2" (12.7 mm) and 5⁄8" (15.9 mm) Type X (as defined in ASTM C1396). A Type X abuse-resistant board is also available.

This product scores a 10*, the highest level of performance for mold resistance under the ASTM D3273 test method.


  • 5/8" (16.9mm) ToughRock® Fireguard X® Mold-Guard™ Gypsum Board and 5/8” (16.9 mm) ToughRock® Fireguard X® Mold-Guard™ Abuse-Resistant Gypsum Board have a Type X core (per ASTM C1396) and are UL classified Type X for use in a variety of fire-rated wood and steel-framed assemblies. Search the assemblies library for details
  • ToughRock® Fireguard X® Mold-Guard™ Abuse-Resistant Gypsum Board meets requirements for abuse resistance when tested in accordance with ASTM C1629.
  • Require no special tools for installation, board scores and snaps easily
  • Has a noncombustible (as described and tested in accordance with ASTM E136), dimensionally stable gypsum core
  • 100% recycled, green treated face paper and moisture-resistant core
  • These products have achieved GREENGUARD and GREENGUARD GOLD Certification. GREENGUARD Certified products are certified to GREENGUARD standards for low Volatile Organic Compound (VOC) emissions into indoor air during product usage.


  • Interior wall and ceiling drywall applications in high humidity areas such as kitchens, bathrooms, basements and laundry rooms. This board may be used in wet areas behind tile, such as tub and shower areas, when C1396, Section 7 is allowed by local building code in such applications.**
  • With proper surface preparation, it will accommodate a variety of decorative treatments such as paint and wallpaper.




Safety & Sustainability

For important product fire, safety, and use information, go to

*The score of 10, in the ASTM D3273 test, indicates no mold growth in a 4-week controlled laboratory test. The mold resistance of any building product when used in actual job site conditions may not produce the same results as were achieved in the controlled, laboratory setting. No material can be considered mold proof. When properly used with good design, handling and construction practices, ToughRock® Mold-Guard™ Gypsum Board provides increased mold resistance compared to standard paper-faced wallboard products.

**Georgia-Pacific recommends DensShield® Tile Backer for tile applications in wet areas such as showers where 2006 or later IBC or IRC are referenced.

Frequently Asked Questions

Can ToughRock® Mold-Guard Gypsum Board be used in wet areas? What should be done if gypsum board gets wet? How often is a control joint required? Get these answers and others here.

Fire-Rated ToughRock Gypsum Boards All ToughRock Categories

* For additional information concerning fire ratings, go to

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