National Gypsum Company
2001 Rexford Road
Charlotte, NC 28211
Toll Free: (800) 628-4662
Technical Information: (800) NATIONAL (628-4662)
Technical Fax Line: (800) FAXNGC1 (329-6421)
E-mail: techservice@nationalgypsum.com
Web site: http://www.Nationalgypsum.com
Web site: http://www.Nationalgypsum.com/espanol

Hi-Impact^® BRAND XP® Wallboard panels consist of a specially treated, fire resistant, mold and moisture resistant Type X gypsum core encased in 100% recycled heavy, smooth, moisture, mold/mildew and abrasion resistant purple paper on the face side and strong 100% recycled mold and mildew resistant liner paper on the back side. A fiberglass mesh is embedded into the core, close to the back side of the board to provide additional impact/penetration resistance.

Hi-Impact XP Wallboard features a specially formulated core to provide fire resistance ratings when used in tested systems in addition to providing extra protection against mold and mildew compared to standard wallboard products. Tapered edges allow joints to be reinforced with ProForm® BRAND Joint Tape, and concealed with ProForm® BRAND Ready Mix or setting compounds.

• This unique wallboard is designed for use in wall assemblies in areas where surface durability, impact/penetration, moisture, mold, and mildew resistance are major concerns.
• 5/8" Fire-Shield Hi-Impact XP panels may be used where Type X gypsum panels are specified in some fire-rated wall assemblies (e.g., UL U300, U400 and V400 series).

• Resists the growth of mold per ASTM D 3273.
• Hi-Impact XP Wallboard can be used on the interior side of exterior walls in hot, humid climates such as the Southern Atlantic and Gulf Coast areas.
• Lightweight, cost-efficient material that readily accepts a wide range of decorative finishes.
• Hi-Impact XP Wallboard is easily cut for quick installation, permitting painting or other decoration and the installation of most metal or wood trim almost immediately.
• The gypsum core will not support combustion or transmit temperatures greatly in excess of 212°F (100°C) until completely calcined, a slow process.
• Expansion and contraction under normal atmospheric changes is negligible.
• Does not require the added strength of a setting type compound for joint reinforcement.
• Allows for same joint treatment reinforcement procedures as standard drywall, thereby reducing cost and the risk of improper installation.
• Transitions into drywall without the use of control joints.
• Hi-Impact XP Wallboard can be used as a tile backer board in dry areas or areas with limited water exposure such as toilet/sink areas and areas above tile in tubs and showers.
• Saves time by eliminating the need for special cutting tools and rasping of cut edges.

*The use of Hi-Impact XP in actual installations may not produce the same results as were achieved in controlled, laboratory conditions. No material can be considered "mold-proof", nor is it certain that any material will resist mold or mildew indefinitely. When used in conjunction with good design, handling and construction practices, Hi-Impact XP can provide increased mold resistance versus standard wallboard products. As with any building material, avoiding water exposure during handling, storage, and installation and after installation is complete, is the best way to avoid the formation of mold or mildew.