1/4" PermaBase® BRAND Cement Board is a rigid substrate made of Portland cement, aggregate and glass mesh that provides an exceptionally hard, durable surface that is able to withstand prolonged exposure to moisture.

PermaBase offers a competitive advantage over similar products on the market with its patented EdgeTech® technology. The tapered, double-wrapped edge design allows for closer nail or screw application to the edge while helping prevent damage in transit and on the jobsite.

Applications

• PermaBase is ideally suited as an underlayment or backing surface for tub and shower surrounds, countertops, flooring and a variety of other interior and exterior applications. .

• 30-Year Limited Warranty on PermaBase Interior Applications.
  
• 10-Year Limited Warranty on PermaBase Exterior Applications.
  
• Double-wrapped edge with EdgeTech technology allows for closer fastener application of nails or screws at the edge without crumbling or spinout.
  
• IRC and IBC 2006 Compliant - Meets ASTM C 1325.
  
• Resists the growth of mold and mildew achieving a panel score of 10, the highest possible, per ASTM D 3273.
  
• Highly moisture resistant, and will not rot, disintegrate or swell when exposed to water.
  
• Suitable for both interior and exterior applications.
  
• Impact resistant, extremely durable and dimensionally stable. It has excellent overall flexural, compressive, and tensile strength characteristics.
  
• Can be cut to size utilizing a standard utility knife and straightedge.

GREENGUARD Certified

PermaBase Cement Board is GREENGUARD Children & Schools Certified® for indoor air quality.

The GREENGUARD Children & Schools Certified® Mark is a registered certification mark used under license through the GREENGUARD Environmental Institute.

The GREENGUARD Certification ProgramSM is an industry independent, third-party program that has been certifying products for low non-toxic emissions since 2001. To achieve GREENGUARD Indoor Air Quality Certified status, National Gypsum's products passed rigorous sample testing and review of the manufacturing processes to meet strict standards set by the GREENGUARD Environmental Institute (GEI) — a globally recognized leader in indoor air quality — to determine their impact on indoor air pollution. To achieve GREENGUARD Children & Schools Certification, Hi-Impact XP Gypsum Board met even more stringent emissions limits that take into account the added sensitivity of children and adults with compromised immune systems.