6:30AM to 4:00PM
Sat: 6:30AM - 12PM

National Gypsum Permabase Cement Board Supplier in Upper Darby

Local Supplier of Drywall

Serving Bucks, Montgomery, Chester, Delaware, Philadelphia County

National Gypsum is one of the largest gypsum board producers in the world. Gypsum board is the company’s primary product, and National Gypsum is the second largest producer in the United States. Cement board, marketed under the PermaBase® BRAND, is the company’s third business line.

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 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.


  • Reinforced 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 per ASTM D 3273 with a score of 10, the best possible score.
  • Can be cut utilizing a standard utility knife and straight edge. With PermaBase’s unique core composition, little or no additional labor is needed to clean the edge after a cut.
  • PermaBase is impact resistant, extremely durable and dimensionally stable. It has excellent overall flexural, compressive, and tensile strength characteristics.
  • PermaBase is highly moisture resistant, and will not rot, disintegrate or swell when exposed to water.
    1/2″ PermaBase may be used in 1 hour and 2 hour rated assemblies and is UL Classified.
  • PermaBase has a smoother finish than other brands and has no open edges, which reduces hand chafing.
  • Lowest water absorption of any cement board per ASTM C 473.
  • Suitable for both interior and exterior applications.


  • 3x5x1/4″
  • 3x5x1/2″
  • 3x6x1/2″
  • 4x8x1/2″
  • 4x8x5/8″
  • Joint Compound : Blue Lid, Green Lid, Purple Lid
  • Easy Sand- 20 min, 45 min, 90 min
  • Durabond- 20 min, 45 min, 90 min
  • Drywall Tapes- Paper Tape, Mesh tape, Level Line, No Coat 325 & 450, Sure Corner
  • Beads (Plastic and Metal)- Corner Bead, Arch Bead, Tear Away bead, Bullnose Corner Bead, “L” Bead, “J” Bead

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For your convenience, we offer both pickup and delivery to your home or jobsite. No job is too big or too small for us to handle. We have been serving the community for over 70 years and we always make sure to treat our customers like family!


We deliver to Pennsylvania, New Jersey & Delaware locations. Your project not located in these areas? Call us for more info!

Instore Pickup

Looking to buy materials for you next home or work project? Bring your vehicle down to our location and we will help load you up and get you on your way!


Brick, Block, Cement, & Stone Supplies Serving Bucks, Montgomery, Chester, Delaware, Philadelphia County

Our goal is to provide top of the line products both homeowners and professional builders can use for their building projects. That’s why we carry some of the top brands in the industry. We stand behind our products and have ensured that everything we provide is held to the highest standards in terms of quality, as well as price. Our staff is also highly knowledgeable of our brands and product offerings, so if you have any questions, you can always turn to the team here at State Road Builders Supply. We strive to be the go-to source of quality building supplies in the Philadelphia area and surrounding counties.